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238 results for “Dawn”
Data from: Playback of predator calls inhibits and delays dawn singing in a songbird community
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GRIP DOPPLER AEROSOL WIND LIDAR (DAWN) V1
The GRIP Doppler Aerosol WiNd Lidar (DAWN) Dataset was collected by the Doppler Aerosol WiNd (DAWN), a pulsed lidar, which operated aboard a NASA DC-8 aircraft during the Genesis and Rapid Intensification Processes (GRIP) field campaign. he major goal was to better understand how tropical storms form and develop into major hurricanes. NASA used the DC-8 aircraft, the WB-57 aircraft and the Global Hawk Unmanned Airborne System (UAS), configured with a suite of in situ and remote sensing instruments that were used to observe and characterize the lifecycle of hurricanes. This campaign also capitalized on a number of ground networks and space-based assets, in addition to the instruments deployed on aircraft from Ft. Lauderdale, Florida ( DC-8), Houston, Texas (WB-57), and NASA Dryden Flight Research Center, California (Global Hawk). Data values include Line-of-Sight (LOS) Winds, calculated vertical profiles of horizontal wind velocity, frequency-domain signal energy and time versus latitude and longitude. Instrument details can be found in the dataset documentation. Data was gathered during August 24, 2010 thru September 22, 2010 over the Atlantic Ocean.
RNA-seq of Arabidopsis seedlings treated with chemical modifiers of sugar signalling at dawn
GEO Series GSE188596. Arabidopsis thaliana. 18 samples. Type: Expression profiling by high throughput sequencing.
Supplementary material 1 from: Ulmer JM, Janšta P, Azar D, Krogmann L (2024) Corrigendum: UImer JM, Janšta P, Azar D, Krogmann L (2023) At the dawn of megadiversity – Protoitidae, a new family of Chalcidoidea (Hymenoptera) from Lower Cretaceous Lebanese amber. Journal of Hymenoptera Research 96: 879–924. doi: 10.3897/jhr.96.105494. Journal of Hymenoptera Research 97: 43-44. https://doi.org/10.3897/jhr.97.115499
Updated checklist of fossil Chalcidoidea data
Simulated Dawn Med Students
ClinicalTrials.gov study NCT02088593. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Diabetes Autoimmunity Withdrawn in New Onset Patients (DAWN)
ClinicalTrials.gov study NCT03794973. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
The DAWN Antivirals Trial for Ambulatory COVID-19 Patients
ClinicalTrials.gov study NCT04730206. IPD Sharing: Not stated. Countries: 1. Publications: 0.
CPEX DAWN WIND PROFILES
During 25 May – 24 June 2017, NASA funded and conducted the Convective Processes Experiment (CPEX) which was based out of Ft. Lauderdale, FL and used a suite of instruments aboard a NASA DC-8 aircraft to investigate convective process and circulations over tropical waters. A main objective of CPEX was to obtain a comprehensive set of temperature, humidity and, particularly, wind observations in the vicinity of scattered and organized deep convection in all phases of the convective life cycle.The featured instrument of the airborne campaign was NASA’s Doppler Aerosol WiNd (DAWN) lidar but also included dropsondes, the Airborne Second Generation Precipitation Radar (APR-2), the High Altitude MMIC Sounding Radiometer (HAMSR), the Microwave Temperature and Humidity Profiler (MTHP), and the Microwave Atmospheric Sounder for Cubesat (MASC).In total, the CPEX campaign flew 16 missions over the Atlantic Ocean, Caribbean Sea and the Gulf of America and included missions investigating undisturbed conditions, scattered convection, organized convection and the environment of a tropical storm. The DAWN (and Dropsonde) wind measurement collected during CPEX have provided a unique set of wind profiles to be used in analysis and model assimilation and prediction studies. CPEX also utilized the High Definition Sounding System (HDSS) dropsonde delivery system developed by Yankee Environmental Services to drop almost 300 dropsondes to obtain additional high-resolution vertical wind profiles during most missions. These dropsondes also provided needed calibration/validation for the much newer DAWN measurements.
Polar Winds I - Doppler Aerosol WiNd (DAWN) - KingAirUC-12B
PolarWindsI_DAWN_KingAirUC-12B is the Polar Winds I - Doppler Aerosol WiNd (DAWN) - KingAirUC-12B data product. Data for this was collected using the DAWN instrument flown on the NASA Langley Beechcraft UC-12B Huron aircraft. Data collection for this product is complete. Polar Winds I was based in Kangerlussuaq, Greenland and flew DAWN on board the NASA King Air UC-12B during Oct-Nov 2014 while Polar Winds II was based in Keflavik, Iceland and utilized the NASA DC-8 aircraft to fly DAWN and Dropsondes over the Arctic in May 2015. In total, twenty-four individual missions with over 80 hours of research flights were flown in the Arctic region near Greenland and Iceland during Polar Winds.The focus instrument for the wind measurements taken over the Arctic during Polar Winds was the DAWN airborne wind lidar. At a wavelength of 2.05 microns and at 250 mj per pulse, DAWN is the most powerful airborne Doppler Wind Lidar available today for airborne missions. DAWN has previously been flown on the NASA DC-8 during the 2010 Genesis and Rapid Intensification Processes (GRIP) campaign and on the NASA UC-12 for wind field characterization off the coast of Virginia. In addition to DAWN, Polar Winds utilized the High Definition Sounding System (HDSS) dropsonde delivery system developed by Yankee Environmental Services to drop almost 100 dropsondes during Polar Wind II to obtain additional high-resolution vertical wind profiles during most missions. These dropsondes also provided needed calibration/validation for the much newer DAWN measurements.Beginning in the fall of 2014, NASA sponsored two airborne field campaigns, collectively called Polar Winds, designed to fly the Doppler Aerosol WiNd (DAWN) lidar and other instruments to take airborne wind measurements of the Arctic atmosphere, specifically over and off the coasts of Greenland during Oct-Nov 2014 and May 2015. In particular, Polar Winds conducted a series of science experiments focusing on the measurement and analyses of lower tropospheric winds and aerosols associated with coastal katabatic flows, barrier winds, the Greenland Tip Jet, boundary layer circulations such as rolls and OLEs (Organized Large Eddies), and near surface winds over open water, transitional ice zones and the Greenland Ice Cap.
CPEX-AW DAWN Doppler Aerosol WiNd Lidar
CPEXAW-DAWN_DC8_1 are the Doppler Aerosol WiNd lidar (DAWN) image and NetCDF data files collected during the Convective Processes Experiment - Aerosols & Winds (CPEX-AW) onboard the DC-8 aircraft. Data collection for this product is complete.The Convective Processes Experiment – Aerosols & Winds (CPEX-AW) campaign was a joint effort between the US National Aeronautics and Space Administration (NASA) and the European Space Agency (ESA) with the primary goal of conducting a post-launch calibration and validation activities of the Atmospheric Dynamics Mission-Aeolus (ADM-AEOLUS) Earth observation wind Lidar satellite in St. Croix. CPEX-AW is a follow-on to the Convective Processes Experiment (CPEX) field campaign which took place in the summer of 2017. In addition to joint calibration/validation of ADM-AEOLUS, CPEX-AW studied the dynamics related to the Saharan Air Layer, African Easterly Waves and Jets, Tropical Easterly Jet, and deep convection in the InterTropical Convergence Zone (ITCZ). CPEX-AW science goals include:• Better understanding interactions of convective cloud systems and tropospheric winds as part of the joint NASA-ESA Aeolus Cal/Val effort over the tropical Atlantic;• Observing the vertical structure and variability of the marine boundary layer in relation to initiation and lifecycle of the convective cloud systems, convective processes (e.g., cold pools), and environmental conditions within and across the ITCZ;• Investigating how the African easterly waves and dry air and dust associated with Sahara Air Layer control the convectively suppressed and active periods of the ITCZ;• Investigating interactions of wind, aerosol, clouds, and precipitation and effects on long range dust transport and air quality over the western Atlantic.In order to successfully achieve the objectives of the campaign, NASA deployed its DC-8 aircraft equipped with an Airborne Third Generation Precipitation Radar (APR-3), Doppler Aerosol WiNd Lidar (DAWN), High Altitude Lidar Observatory (HALO), High Altitude Monolithic Microwave Integrated Circuit (MMIC) Sounding Radiometer (HAMSR), and dropsondes. This campaign aims to provide useful material to atmospheric scientists, meteorologists, lidar experts, air quality experts, professors, and students. The Atmospheric Science Data Center (ASDC) archives the dropsonde, HALO, and DAWN data products for CPEX-AW. For additional datasets please visit the Global Hydrometeorology Resource Center (GHRC).
Aeolus CalVal DAWN Wind Profiles
AEOLUS-CALVAL-DAWN_DC8_1 is the Aeolus CalVal DAWN (Doppler Aerosol WiNd) Lidar Wind Profiles data product. Data was collected using the DAWN instrument on the Douglas (DC-8) Aircraft. Data collection for this product is complete. NASA conducted an airborne campaign from 17 April to 30 April 2019 to: 1) demonstrate the performance of the Doppler Aerosol WiNd Lidar (DAWN) and High Altitude Lidar Observatory (HALO) instruments across a range of aerosol, cloud, and weather conditions; 2) compare these measurements with the European Space Agency Aeolus mission to gain an initial perspective of Aeolus performance in preparation for a future international Aeolus Cal/Val airborne campaign; and 3) demonstrate how weather processes can be resolved and better understood through simultaneous airborne wind, water vapor (WV), and aerosol profile observations, coupled with numerical model and other remote sensing observations. Five NASA DC-8 aircraft flights, comprising 46 flight hours, were conducted over the Eastern Pacific and Southwest U.S., based out of NASA Armstrong Flight Research Center in Palmdale, CA and Kona, HI. Yankee Environmental Systems, Inc High Definition Sounding System (HDSS) eXpendable Digitial Dropsondes (XDD) were used to validate the DAWN and Aeolus wind observations. The LaRC Diode Laser Hygrometer instrument, which was integrated on the DC-8 in preparation for another NASA airborne campaign, provided in-situ WV measurements used during one flight to validate HALO and dropsonde WV profile products.
Polar Winds II - Doppler Aerosol WiNd (DAWN) - DC8
PolarWindsII_DAWN_DC8_1 is the Polar Winds II - Doppler Aerosol WiNd (DAWN) - DC8 data product. Data collection for this product is complete. Beginning in the fall of 2014, NASA sponsored two airborne field campaigns, collectively called Polar Winds, designed to fly the Doppler Aerosol WiNd (DAWN) lidar and other instruments to take airborne wind measurements of the Arctic atmosphere, specifically over and off the coasts of Greenland during Oct-Nov 2014 and May 2015. In particular, Polar Winds conducted a series of science experiments focusing on the measurement and analyses of lower tropospheric winds and aerosols associated with coastal katabatic flows, barrier winds, the Greenland Tip Jet, boundary layer circulations such as rolls and OLEs (Organized Large Eddies), and near surface winds over open water, transitional ice zones and the Greenland Ice Cap.Polar Winds I was based in Kangerlussuaq, Greenland and flew DAWN on board the NASA King Air UC-12B during Oct-Nov 2014 while Polar Winds II was based in Keflavik, Iceland and utilized the NASA DC-8 aircraft to fly DAWN and Dropsondes over the Arctic in May 2015. In total, twenty-four individual missions with over 80 hours of research flights were flown in the Arctic region near Greenland and Iceland during Polar Winds.The focus instrument for the wind measurements taken over the Arctic during Polar Winds was the DAWN airborne wind lidar. At a wavelength of 2.05 microns and at 250 mj per pulse, DAWN is the most powerful airborne Doppler Wind Lidar available today for airborne missions. DAWN has previously been flown on the NASA DC-8 during the 2010 Genesis and Rapid Intensification Processes (GRIP) campaign and on the NASA C-12 for wind field characterization off the coast of Virginia. In addition to DAWN, Polar Winds utilized the High Definition Sounding System (HDSS) dropsonde delivery system developed by Yankee Environmental Services to drop almost 100 dropsondes during Polar Wind II to obtain additional high-resolution vertical wind profiles during most missions. These dropsondes also provided needed calibration/validation for the much newer DAWN measurements.
dawn at the pier
<u>Source</u>: Flickr <br><u>4DCity URL</u>: <a href="https://4dcity.org/imgupload/1677512200.4811.jpg">https://4dcity.org/imgupload/1677512200.4811.jpg</a> <br><u>Original Image URL</u>: <a href="https://live.staticflickr.com/65535/52388862563_4c58b76466_m.jpg">https://live.staticflickr.com/65535/52388862563_4c58b76466_m.jpg</a>
Figure 4 in 'Dawn' hexapods in Cenozoic ambers (Diplura: Campodeoidea)
Figure 4. Photomicrographs of Lepidocampa glaesi, M-982, in Miocene Dominican amber. A, ventral habitus. B, dorsal habitus. Both to the same scale.
Figure 12 in Fossil diversity in 'dawn' hexapods (Diplura: Projapygoidea), with direct evidence for being chemically predaceous in the Cretaceous
Figure 12. Specimen of Symphylurinus sp. 2 (M-2233) in Miocene Dominican amber. A, photomicrograph of right lateral habitus. B, camera lucida drawing. Abbreviations: lp, labial palp; scA, lateral subcoxal appendage; stVII, stylus VII. Scale bars: 0.2 mm.
Figure 13 in Fossil diversity in 'dawn' hexapods (Diplura: Projapygoidea), with direct evidence for being chemically predaceous in the Cretaceous
Figure 13. Volume renderings of Symphylurinus sp. 2 (M-2233) in Miocene Dominican amber. A, dorsal habitus. B, ventral habitus. C, left lateral habitus. All to the same scale. Scale bar: 0.5 mm.
Figure 11 in Fossil diversity in 'dawn' hexapods (Diplura: Projapygoidea), with direct evidence for being chemically predaceous in the Cretaceous
Figure 11. Camera lucida drawings of Symphylurinus sp. 1 (AMNH KL-DR2022-1) in Miocene Dominican amber. A, detail of head and antennae in dorsal view. B, detail of thorax showing the distribution of macrosetae. C, detail of cerci in dorsal view. Abbreviations: b, bubble; M, macroseta. A, C are to the same scale. Scale bars: 0.1 mm.
Figure 9 in Fossil diversity in 'dawn' hexapods (Diplura: Projapygoidea), with direct evidence for being chemically predaceous in the Cretaceous
Figure 9. Photomicrograph of Symphylurinus sp. 1 (AMNH KL-DR2022-1), dorsal habitus, in Miocene Dominican amber. Scale bar: 0.5 mm.
Figure 10 in Fossil diversity in 'dawn' hexapods (Diplura: Projapygoidea), with direct evidence for being chemically predaceous in the Cretaceous
Figure 10. Photomicrographs of Symphylurinus sp. 1 (AMNH KL-DR2022-1) in Miocene Dominican amber. A, detail of head in dorsal view. B, detail of head in ventral view. C, detail of cerci in dorsal view. D, left infundibuliform complex showing the orifice. E, detail of pretarsus of left leg II. F, right infundibuliform complex showing an incipient secretion. Abbreviation: lp, labial palpus. A–C and D–F are to the same scale. Scale bars: 0.1 mm in A–C; 0.05 mm in D–F.
Figure 6 in Fossil diversity in 'dawn' hexapods (Diplura: Projapygoidea), with direct evidence for being chemically predaceous in the Cretaceous
Figure 6. Photomicrographs of Symphylurinus sp. 1 (AMNH JZC-DR005) in Miocene Dominican amber. A, left ventrolateral habitus. B, detail of cerci. Abbreviations: gp, genital papilla; stVII, stylus VII. Scale bars: 1 mm in A; 0.1 mm in B.
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OpenNeuro
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