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2 results for “Trophic state index”
A dataset of trophic state index for nation-scale lakes in China
<p>The trophic state index (TSI) serves as a key indicator for understanding the spatial pattern and temporal variation in lake eutrophication, which has not been fully explored for long-term environmental monitoring, especially for small and medium lakes. Landsat satellites provide the capability of monitoring the temporal and spatial distribution of small lakes with a 30 m spatial resolution, which offers an effective complement. Here we generated a dataset of TSI for lakes in China (CNLTSI) using Landsat archives (Landsat-5 TM, Landsat-7 ETM+, and Landsat-8 OLI) from 1984 to 2023, which contains 2693 predominantly small to medium nationwide lakes in China in the past 4 decades. The dataset produced has a spatial resolution of 30 m and varying temporal resolution due to differences in satellite overpasses and cloud interference. </p>
Data and Code Supporting Hagy et al. Quantifying coastal ecosystem condition and a trophic state index with a Bayesian analytical framework
<p>The code includes several R markdown files and an associated file containing R functions. The main body of code <em>coastal_TSI_ts.Rmd</em> loads the function file located in the functions folder. Raw data is included as .csv files in the raw directory and various data sets created as intermediate products are in the data folder. Variable definitions are included in a data dictionary.</p> <p>The code has been used to generate the analysis reported in</p> <p>Hagy, JD, B. Kreakie, M. Pelletier, F. Nojavan, J. Kiddon, and A. Oczkowski. Quantifying coastal ecosystem condition and a trophic state index with a Bayesian analytical framework</p> <p>This file contains a zip of a github repository, https://github.com/USEPA/-cTSI</p>
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