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57 results for “carbon (C)”
Comparing vertical accretion, organic carbon (C) sequestration, and nitrogen burial between a natural, never diked tidal salt marsh and a hydrologically restored tidal salt marsh on Sapelo Island, Georgia.
Restoration of tidal marshes throughout the 20th century have attempted to bring back important functions of natural tidal systems. In this study, vertical accretion, organic carbon (C) sequestration, and nitrogen burial were compared between a natural, never diked tidal salt marsh and a hydrologically restored tidal salt marsh on Sapelo Island, Georgia to examine the impacts of restoration years later. On Sapelo Island there are two marshes near the University of Georgia Marine Institute, one of which is a natural marsh, and one of which is a restored marsh. The restored marsh had been diked in 1948, and the dike was breached, allowing for the marsh to be restored, in 1956. Soil cores were collected from both marshes, and the sediments were analysed for Nitrogen and Carbon concentrations and bulk density. This analysis was used to determine accretion rates for the two marshes as well as changes in the restored marsh since the dike was breached. Nitrogen burial, carbon sequestration, and soil accretion in the restored marsh as compared to the natural marsh were the focus of this study.
Dataset of "Impact of Carbon Corrosion and Denitrogenation on the Deactivation of Fe-N-C Catalysts in Alkaline Media"
<p>In this work, we use a gas diffusion electrode half-cell coupled with inductively coupled plasma mass spectrometry (GDE-ICP-MS) to quantify the Fe dissolution rates in the potential range between 0.93 and 1.5 VRHE. It is shown that Fe dissolution accelerates with increased anodic potential and temperature while it is independent on the presence/absence of O2. The onset potential of Fe dissolution at room temperature agrees with the reported onset potentials of carbon corrosion and denitrogenation, C and N being oxidized to gaseous COx and NOx species, respectively. This correlation supports that the electrochemical oxidation of the N-C matrix triggers the observed catalyst demetallation in these conditions. Using a set of ex situ physicochemical characterization techniques, including spectroscopy and microscopy, the various degrees of degradation under three sets of experimental conditions of interest (O2-RT, O2-HT, and Ar-HT, where RT = 22℃ and HT = 62℃) are rationalized. Combining the GDE-ICP-MS technique and post-mortem analyses, this work provides novel insights into the degradation pathways of various Fe, N, and C species during start-stop events, which may inspire the next generation of durable Fe-N-C catalysts for anion exchange membrane fuel cells.</p>
Nitrogen and carbon concentrations and stable isotope ratios (δ¹⁵N and δ¹³C) in European moss samples, 2005-2006
This dataset contains nitrogen (N) and carbon (C) concentrations and stable isotope ratios (δ¹⁵N and δ¹³C) measured in moss samples collected across Europe within the framework of the ICP Vegetation programme (International Cooperative Programme on Effects of Air Pollution on Natural Vegetation and Crops, UNECE LRTAP Convention). Moss surveys are conducted every five years and the data presented here correspond specifically to the first sampling campaign, carried out in 2005/2006. During the 2005/2006 European moss survey, approximately 3,000 moss samples were collected at non-urban and semi-natural sites across 16 European countries following a standardized biomonitoring protocol. The dataset used in this study comprises a subset of 1,022 moss samples (approximately 35 % of the total survey), provided by 12 European countries, which were selected for the determination of nitrogen and carbon concentrations and their corresponding stable isotope signatures (δ¹⁵N and δ¹³C). Moss samples collected by each participating country were sent to the Integrated Environmental Quality Laboratory (LICA), Institute for Biodiversity and Environment (BIOMA - University of Navarra), where all chemical and isotopic analyses were subsequently performed under uniform analytical conditions. In addition, this dataset incorporates moss data from Sweden, Croatia and Macedonia for the same sampling year, which were not included in the official ICP Vegetation 2005/2006 dataset. The European moss biomonitoring network was established to provide a complementary, high spatial resolution and time-integrated measure of atmospheric deposition of nitrogen and other pollutants within terrestrial ecosystems. The approach is based on the ability of ectohydric mosses to accumulate nutrients and trace elements directly from wet and dry atmospheric deposition, enabling dense spatial sampling across large geographical areas. This biomonitoring framework supports the assessment of spatial patterns of atmos
Stable isotope and conservative tracer data used to estimate uptake of stream water dissolved organic carbon (DOC) through a whole-stream addition of a ¹³C-DOC tracer coupled with laboratory measurements of bioavailability of the tracer and stream water DOC using lability profiling with bioreactors
We performed a whole-stream addition of a ¹³C-DOC tracer and made laboratory measurements of the biological availability of the tracer as well as stream water DOC. The study was performed in October 2002 in a 1.27 km stretch of the third-order White Clay Creek in southeastern Pennsylvania. The tracer was prepared as a cold-water leachate of ¹³C-labeled tulip poplar saplings and it was added to the stream along with sodium bromide, a conservative tracer, over a 2-h period. Stream water samples were collected at 8 downstream stations over an 8-h period, filtered, and analyzed for concentrations of bromide and DOC. DOC was measured by Pt-catalyzed, persulfate oxidation, Br- was analyzed by ion chromatography, and C isotope samples were rotary evaporated, acidified, lyophilized, combusted, and the CO₂ analyzed with an elemental analyzer interfaced with an isotope ratio mass spectrometer. Lability profiling of the ¹³C-DOC tracer and stream water DOC were performed with a series of plug-flow bioreactors of increasing empty-bed contact times with the concentration of biodegradable DOC operationally defined as the difference between the DOC concentrations in the influent and effluent waters of the bioreactors. The bioreactor measurements were performed 2 days after the whole-stream release. Data were analyzed to estimate the uptake of stream water DOC associated with labile and semi-labile fraction of biodegradable DOC. These data have been previously used in a 2008 publication in Freshwater Biology, doi:10.1111/j.1365-2427.2007.01941.x.
Figure 2: The microscopy images fo neuronal cells control (a) generated by MWCNT (b) and SWCNT (c)-COMPARATIVE STUDY OF SINGLE- AND MULTI-WALL CARBON NANOTUBES WITH APPLICATION IN CEREBRAL ANEURYSM
<p>Fig. 2 shows the evolution of a network generated by SWCNT and MWCNT. The data show<br> that cells ¯rst aggregate at the NT islands. As they complete this step axons and dendrites begin to form and to build connections.</p>
РИС. 11. ИЗображениЯ крючков глохидиев при раЗной настройке Яркости и контрастности (Anemina arcaeformis, р. Сита, Хабаровский кр.). А. Оптимальные Яркость и контрастность. В. ИЗбыточнаЯ контрастность. С. ИЗбыточнаЯ Яркость. МасШтаб 20 мкм. Микроскоп Zeiss EVO 40, напыление углеродом. FIG. 11. Imagines of glochidia hooks with different brightness and contrast value (Anemina arcaeformis, Sita River, Khabarovsk Krai). A. Optimal brightness and contrast. B. Excessive contrast. C. Excessive brightness. Scale bars 20 μm. Zeiss EVO 40 microscope, sputter coating with carbon. in Методика подготовки раковин глохидиев (Bivalvia, Unionidae) длЯ работы на сканируюЩем Электронном микроскопе
РИС. 11. ИЗображениЯ крючков глохидиев при раЗной настройке Яркости и контрастности (Anemina arcaeformis, р. Сита, Хабаровский кр.). А. Оптимальные Яркость и контрастность. В. ИЗбыточнаЯ контрастность. С. ИЗбыточнаЯ Яркость. МасШтаб 20 мкм. Микроскоп Zeiss EVO 40, напыление углеродом. FIG. 11. Imagines of glochidia hooks with different brightness and contrast value (Anemina arcaeformis, Sita River, Khabarovsk Krai). A. Optimal brightness and contrast. B. Excessive contrast. C. Excessive brightness. Scale bars 20 μm. Zeiss EVO 40 microscope, sputter coating with carbon.
РИС. 7. НедостаточнаЯ промывка раковин глохидиев после очиЩениЯ в Щелочи (5% КОН). А, С. «Замыленность» пор наружной поверхности створок (Cristaria tuberculata, оЗ. Ханка, Приморский кр.). B. Остаток Щелочи, выпавШий кристаллами на поверхности личинки (Unio dembeae, р. Дуко, ЭфиопиЯ). D. Капли раствора Щелочи (укаЗаны стрелками) на поверхности Шипов крючка (Nodularia douglasiae, р. Гион, о-в Хонсю, ЯпониЯ). МасШтаб 5 мкм (А, С), 2 мкм (B, D). Микроскоп Zeiss MERLIN, напыление углеродом (А, В), хромом (С, D). FIG. 7. Insufficient rinsing of glochidia after cleaning in alkali (5% KOH). A, C. «Blurredness» of the exterior valve pores (Cristaria tuberculata, Khanka Lake, Primorsky Krai). B. Precipitation of alkali crystals on the exterior glochidia surface (Unio dembeae, Duko River, Ethiopia). D. Drops of alkali (indicated by arrows) on the hook spines (Nodularia douglasiae, Gion River, Honshu Island, Japan). Scale bars 5 μm (A, C), 2 μm (B, D). Zeiss MERLIN microscope, sputter coating with carbon (A, B) and chromium (C, D). in Методика подготовки раковин глохидиев (Bivalvia, Unionidae) длЯ работы на сканируюЩем Электронном микроскопе
РИС. 7. НедостаточнаЯ промывка раковин глохидиев после очиЩениЯ в Щелочи (5% КОН). А, С. «Замыленность» пор наружной поверхности створок (Cristaria tuberculata, оЗ. Ханка, Приморский кр.). B. Остаток Щелочи, выпавШий кристаллами на поверхности личинки (Unio dembeae, р. Дуко, ЭфиопиЯ). D. Капли раствора Щелочи (укаЗаны стрелками) на поверхности Шипов крючка (Nodularia douglasiae, р. Гион, о-в Хонсю, ЯпониЯ). МасШтаб 5 мкм (А, С), 2 мкм (B, D). Микроскоп Zeiss MERLIN, напыление углеродом (А, В), хромом (С, D). FIG. 7. Insufficient rinsing of glochidia after cleaning in alkali (5% KOH). A, C. «Blurredness» of the exterior valve pores (Cristaria tuberculata, Khanka Lake, Primorsky Krai). B. Precipitation of alkali crystals on the exterior glochidia surface (Unio dembeae, Duko River, Ethiopia). D. Drops of alkali (indicated by arrows) on the hook spines (Nodularia douglasiae, Gion River, Honshu Island, Japan). Scale bars 5 μm (A, C), 2 μm (B, D). Zeiss MERLIN microscope, sputter coating with carbon (A, B) and chromium (C, D).
РИС. 10. НаружнаЯ микроскульптура раковин глохидиев при напылении раЗными материалами. А. Углеродом (Kunashiria haconensis, оЗ. Песчаное, о-в КунаШир, Курильские о-ва). В. Хромом (Kunashiria haconensis, оЗ. Песчаное, о-в КунаШир, Курильские о-ва). C. Хромом (Anodonta cygnea, оЗ. Хамржицкое, ПольШа). D. Золотом (Anodonta cygnea, оЗ. Хамржицкое, ПольШа). МасШтабнаЯ линейка 2 мкм. Микроскопы Zeiss EVO 40 (А, С), Zeiss MERLIN (В, D). FIG. 10. External glochidia microsculpture with different material coating. A. Carbon coated (Kunashiria haconensis, Peschanoe Lake, Kunashir Island, Kuril Islands). B. Chromium coated (Kunashiria haconensis, Peschanoe Lake, Kunashir Island, Kuril Islands). C. Chromium coated (Anodonta cygnea, Khamrzhitskoe Lake, Poland). D. Gold coated (Anodonta cygnea, Khamrzhitskoe Lake, Poland). Scale bars 2 μm. Zeiss EVO 40 (A, C) and Zeiss MERLIN (B, D) microscopes. in Методика подготовки раковин глохидиев (Bivalvia, Unionidae) длЯ работы на сканируюЩем Электронном микроскопе
РИС. 10. НаружнаЯ микроскульптура раковин глохидиев при напылении раЗными материалами. А. Углеродом (Kunashiria haconensis, оЗ. Песчаное, о-в КунаШир, Курильские о-ва). В. Хромом (Kunashiria haconensis, оЗ. Песчаное, о-в КунаШир, Курильские о-ва). C. Хромом (Anodonta cygnea, оЗ. Хамржицкое, ПольШа). D. Золотом (Anodonta cygnea, оЗ. Хамржицкое, ПольШа). МасШтабнаЯ линейка 2 мкм. Микроскопы Zeiss EVO 40 (А, С), Zeiss MERLIN (В, D). FIG. 10. External glochidia microsculpture with different material coating. A. Carbon coated (Kunashiria haconensis, Peschanoe Lake, Kunashir Island, Kuril Islands). B. Chromium coated (Kunashiria haconensis, Peschanoe Lake, Kunashir Island, Kuril Islands). C. Chromium coated (Anodonta cygnea, Khamrzhitskoe Lake, Poland). D. Gold coated (Anodonta cygnea, Khamrzhitskoe Lake, Poland). Scale bars 2 μm. Zeiss EVO 40 (A, C) and Zeiss MERLIN (B, D) microscopes.
РИС. 8. Примеры проблем с иЗображением при работе на СЭМ. А, В. Засветка раЗличных частей раковин глохидиев (А. Anodonta anatina (=Colletopterum), оЗ. Красное, ХакасиЯ. В. Inversiunio reinianus, оЗ. Бива, о-в Хонсю, ЯпониЯ). C. РаЗнаЯ скорость сканированиЯ (слева – очень быстраЯ, справа – медленнаЯ) наружной поверхности глохидиЯ (Anodonta cygnea, р. Ялма, МосковскаЯ обл.). D. Артефакты в виде гориЗонтальных полос вследствие накоплениЯ отрицательного ЗарЯда при недостаточном напылении внутренней поверхности глохидиЯ (Nodularia douglasiae, ПетровскаЯ протока, бассейн р. Амур, Хабаровский кр.). МасШтаб 50 мкм (А, В), 2 мкм (С), 5 мкм (D). Микроскопы Zeiss EVO 40 (А, С, D), Zeiss MERLIN (В), напыление углеродом (А, С), хромом (В, D). FIG. 8. Illustration of different problems with SEM images. A, B. Overall illumination of some glochidia shells parts (A. Anodonta anatina (= Colletopterum), Krasnoe Lake, Khakassia. B. Inversiunio reinianus, Biwa Lake, Honshu Island, Japan). C. Different scanning speed (faster on the left and slower on the right) of the exterior glochidia valve (Anodonta cygnea, Yalma River, Moscow Oblast). D. Artifacts as horizontal stripes because of additional accumulation of a negative charge due to insufficient coating of the interior glochidia valve (Nodularia douglasiae, Petrovskaya channel, Amur River basin, Khabarovsk Krai). Scale bars 50 μm (A, B), 2 μm (C), 5 μm (D). Zeiss EVO 40 (A, C, D) and Zeiss MERLIN (B) microscopes, sputter coating with carbon (A, C) and chromium (B, D). in Методика подготовки раковин глохидиев (Bivalvia, Unionidae) длЯ работы на сканируюЩем Электронном микроскопе
РИС. 8. Примеры проблем с иЗображением при работе на СЭМ. А, В. Засветка раЗличных частей раковин глохидиев (А. Anodonta anatina (=Colletopterum), оЗ. Красное, ХакасиЯ. В. Inversiunio reinianus, оЗ. Бива, о-в Хонсю, ЯпониЯ). C. РаЗнаЯ скорость сканированиЯ (слева – очень быстраЯ, справа – медленнаЯ) наружной поверхности глохидиЯ (Anodonta cygnea, р. Ялма, МосковскаЯ обл.). D. Артефакты в виде гориЗонтальных полос вследствие накоплениЯ отрицательного ЗарЯда при недостаточном напылении внутренней поверхности глохидиЯ (Nodularia douglasiae, ПетровскаЯ протока, бассейн р. Амур, Хабаровский кр.). МасШтаб 50 мкм (А, В), 2 мкм (С), 5 мкм (D). Микроскопы Zeiss EVO 40 (А, С, D), Zeiss MERLIN (В), напыление углеродом (А, С), хромом (В, D). FIG. 8. Illustration of different problems with SEM images. A, B. Overall illumination of some glochidia shells parts (A. Anodonta anatina (= Colletopterum), Krasnoe Lake, Khakassia. B. Inversiunio reinianus, Biwa Lake, Honshu Island, Japan). C. Different scanning speed (faster on the left and slower on the right) of the exterior glochidia valve (Anodonta cygnea, Yalma River, Moscow Oblast). D. Artifacts as horizontal stripes because of additional accumulation of a negative charge due to insufficient coating of the interior glochidia valve (Nodularia douglasiae, Petrovskaya channel, Amur River basin, Khabarovsk Krai). Scale bars 50 μm (A, B), 2 μm (C), 5 μm (D). Zeiss EVO 40 (A, C, D) and Zeiss MERLIN (B) microscopes, sputter coating with carbon (A, C) and chromium (B, D).
РИС. 5. ЗагрЯЗнение готовых обраЗцов длЯ СЭМ при длительном хранении в негерметичных условиЯх (A–C) либо при хранении проШедШих процедуру мацерированиЯ беЗ последуюЩего обеЗЗараживаниЯ (D, E). A–С. Бактерии на поверхности глохидиев (Nodularia douglasiae, р. ИлистаЯ, бассейн оЗ. Ханка, Приморский кр.). А. ВнеШний вид глохидиЯ, основное ЗагрЯЗнение на створке в верхней части фото. В. Крючок глохидиЯ, основное ЗагрЯЗнение в левой части фото. С. Створка, вид иЗнутри. D. Единичные бактерии на створке глохидиЯ, вид иЗнутри (Kunashiria japonica, оЗ. Утиное, о-в Зелёный, Курильские о-ва). E. Гифы гриба на створке глохидиЯ, вид на наружную пору (Beringiana beringiana, оЗ. АЗабачье, Камчатка). МасШтаб 50 мкм (А, C), 10 мкм (В, D), 1 мкм (Е). Микроскопы Zeiss MERLIN (А, B, C, E), Zeiss EVO 40 (D), напыление хромом (А–С), Золотом (D), углеродом (Е). FIG. 5. Contamination of the SEM ready-made samples during long-term storage under unsealed conditions (A–C) or during storage the samples that have passed the maceration procedure without subsequent disinfection (D, E). A–C. Bacteria on the glochidia surface (Nodularia douglasiae, Ilistaya River, Khanka Lake basin, Primorsky Krai). A. Glochidium with the main pollution on the valve in the upper part of the photo. B. Hook with the main pollution on the left side of the photo. C. Interior valve. D. Bacteria on the interior valve (Kunashiria japonica, Utinoe Lake, Zeliony Island, Kuril Islands). E. Fungal hyphae on the pore of exterior valve (Beringiana beringiana, Azabachye Lake, Kamchatka). Scale bars 50 μm (A, C), 10 μm (B, D), 1 μm (E). Zeiss MERLIN (A, B, C, E) and Zeiss EVO 40 (D) microscopes, sputter coating with chromium (A–C), gold (D), and carbon (E). in Методика подготовки раковин глохидиев (Bivalvia, Unionidae) длЯ работы на сканируюЩем Электронном микроскопе
РИС. 5. ЗагрЯЗнение готовых обраЗцов длЯ СЭМ при длительном хранении в негерметичных условиЯх (A–C) либо при хранении проШедШих процедуру мацерированиЯ беЗ последуюЩего обеЗЗараживаниЯ (D, E). A–С. Бактерии на поверхности глохидиев (Nodularia douglasiae, р. ИлистаЯ, бассейн оЗ. Ханка, Приморский кр.). А. ВнеШний вид глохидиЯ, основное ЗагрЯЗнение на створке в верхней части фото. В. Крючок глохидиЯ, основное ЗагрЯЗнение в левой части фото. С. Створка, вид иЗнутри. D. Единичные бактерии на створке глохидиЯ, вид иЗнутри (Kunashiria japonica, оЗ. Утиное, о-в Зелёный, Курильские о-ва). E. Гифы гриба на створке глохидиЯ, вид на наружную пору (Beringiana beringiana, оЗ. АЗабачье, Камчатка). МасШтаб 50 мкм (А, C), 10 мкм (В, D), 1 мкм (Е). Микроскопы Zeiss MERLIN (А, B, C, E), Zeiss EVO 40 (D), напыление хромом (А–С), Золотом (D), углеродом (Е). FIG. 5. Contamination of the SEM ready-made samples during long-term storage under unsealed conditions (A–C) or during storage the samples that have passed the maceration procedure without subsequent disinfection (D, E). A–C. Bacteria on the glochidia surface (Nodularia douglasiae, Ilistaya River, Khanka Lake basin, Primorsky Krai). A. Glochidium with the main pollution on the valve in the upper part of the photo. B. Hook with the main pollution on the left side of the photo. C. Interior valve. D. Bacteria on the interior valve (Kunashiria japonica, Utinoe Lake, Zeliony Island, Kuril Islands). E. Fungal hyphae on the pore of exterior valve (Beringiana beringiana, Azabachye Lake, Kamchatka). Scale bars 50 μm (A, C), 10 μm (B, D), 1 μm (E). Zeiss MERLIN (A, B, C, E) and Zeiss EVO 40 (D) microscopes, sputter coating with chromium (A–C), gold (D), and carbon (E).
Supplementary material from: Wolz D, Seidel-Greiff R, Behnisch T, Kruppke I, Kuznik I, Bertram P, Jäger H, Gude M, Cherif C (2024) Potentials of Polyacrylonitrile Substitution by Lignin for Continuous Manufactured Lignin/Polyacrylonitrile-Blend-Based Carbon Fibers
<p>This material contains all research data concerning the analyses conducted in the work taht was published as "<strong>Potentials of Polyacrylonitrile Substitution by Lignin for Continuous Manufactured Lignin/Polyacrylonitrile-Blend-Based Carbon Fibers</strong>" in the <strong>MDPI</strong> journal <strong>Fibers.</strong></p> <p>Process data cannot be included for reasons of confidentiality.</p>
Fig. 3 Upper Jurassic foraminifers from the Ardeu Unit. a-c in Foraminiferal Assemblages And Facies Associations In The Upper Jurassic Carbonates From Ardeu Unit (Metaliferi Mountains, Romania)
Fig. 3 Upper Jurassic foraminifers from the Ardeu Unit. a-c Bramkampella arabica Redmond (a - Sample 65, b - Sample 172, c - Sample 146). d Undetermined lituolid (Sample 41). e Kaminskia-type foraminifer with fine canaliculated wall (Sample 66). f-h Everticyclammina praekelleri Banner & Highton (Sample 65). i Alveosepta jaccardi (Schrodt) (Sample 49). j-l Ammobaculites sp. (j - Sample 65, k - Sample 110, l - Sample 95). m-n Charentia evoluta (Gorbachik) (m - Sample 32, n - Sample 45). o-p Protopeneroplis striata Weynschenk (o - Sample 153, p - Sample 212).
Fig. 4 Upper Jurassic foraminifers from the Ardeu Unit. a-c in Foraminiferal Assemblages And Facies Associations In The Upper Jurassic Carbonates From Ardeu Unit (Metaliferi Mountains, Romania)
Fig. 4 Upper Jurassic foraminifers from the Ardeu Unit. a-c Mohlerina basiliensis (Mohler) (a - Sample 31, b - Sample 14, c - Sample 7). d-e Coscinoconus alpinus Leupold (d - Sample 17, e - Sample 21). f Coscinoconus sp. (Sample 110). g-h Troglotella incrustans Wernli & Fookes (g - Sample 10, h - Sample 85). i Troglotella incrustans associated with a Lithocodium aggregatum oncoid (Sample 85). j-k Redmondoides lugeoni (Septfontaine) (j - Sample 138, k - Sample 45). l Lenticulina sp. (Sample 145). m Nautiloculina bronnimanni Arnaud-Vanneau & Peybernès (Sample 174). n Coscinophragma sp. (Sample 182). o Haddonia sp. (Sample 53). p Neokilianina rahonensis (Foury & Vincent) (Sample 115).
Fig. 5 a, b Microfacies from the second rudist-bearing lithosome. a, c-e in Upper Cretaceous Rudist-Bearing Mixed Siliciclastic-Carbonate And - Volcanoclastic Deposits From Strâmturii Valley, Borod Basin, Northern Apuseni Mountains: Description, Microfacies And Depositional Environments
Fig. 5 a, b Microfacies from the second rudist-bearing lithosome. a, c-e Bioclastic-extraclastic floatstone; frequent bioclasts are represented by rudist fragments, echinoderm fragments and bivalves fragments; the rudist shells are fragment- ed and perforated (a, d). b Bioclastic-extraclastic rudstone/grainstones with rudist, echinoderm fragments and red algae fragments.
Concentration of dissolved inorganic carbon (DIC), carbon and nitrogen concentrations, C:N ratios and del 13C isotope value for lakes and rivers on North Slope from Brooks Range to Prudhoe Bay, Arctic LTER 1988 to 2005
Composite file describing plant, animal, water, and sediment samples collected at various sites near Toolik Research Station (68 38'N, 149 36'W). Sample site descriptors include an assigned number specific to the file, a number that relates the samples to other samples collected on the same date and time (sortchem), site, date, time, and depth. Samples are identified by type, category, and a short description. Data include isotope values, carbon and nitrogen concentrations, and C:N ratios of samples.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): leaf C, N, delta-13C, delta-15N at peak biomass; 2009-2019
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. This data set includes carbon (C) and nitrogen (N) elemental and isotope content in leaves collected from winter warming, summer warming, and control treatment plots at CiPEHR.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): C, N, delta-13C, delta-15N from senescent leaves, 2009-2015.
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. This data set includes carbon (C) and nitrogen (N) elemental and isotope content in leaves collected from winter warming, summer warming, and control treatment plots at CiPEHR.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating and Drying Research (DryPEHR): leaf C, N, delta-13-C, delta-N-15 2011-2019
This drying and warming experiment addresses the following questions: 1) Does ecosystem drying, warming and permafrost thaw cause a net release or uptake of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C that comprises the bulk of the soil C pool influence ecosystem C loss? 3) How do drying and warmign affect plant communities and ecosystem properties? We are answering these questions using a combined warming and drying experiment (DryPEHR), which is situated with the Carbon in Permafrost Experimental Heating Research (CiPEHR) project and located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. Warming treatment here refers to growing season air temperature warming (~1C) using open top chambers (OTC) combined with soil 'warming' using snow fences during the snow covered months. Drying is achieve using an automated pumping system that lowers the water table in the dry plots. Soil warming began in 2008; OTCs and drying in 2011. This data set includes foliar %C, %N, delta-13-C, delta-N-15 from green leaves collected in July and from senesced leaves collected in September.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): leaf SLA, C, N, P, Ca, delta-13C, delta-15N at peak biomass, 2017
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. This data set includes carbon (C) and nitrogen (N) elemental and isotope content in leaves collected from winter warming, summer warming, and control treatment plots at CiPEHR.
Supplementary data as part of the article "The role of carbon capture, utilization and storage for economic pathways that limit global warming to below 1.5 °C" (https://doi.org/10.1016/j.isci.2022.104237).
<p>Data of the plots in Figure 1a and Figure 1b, showing, respectively, the incremental and the integrated global CO<sub>2</sub> emissions for the 1.5 °C-committed decarbonization pathways from IPCC (P1, P2, P3, and P4 pathways) and the one originally obtained in this work (Q pathway).</p>
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