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This dataset contains standardized in-situ soil moisture measurements from four sparse soil moisture monitoring networks in the South Central United States. This includes measurements in Oklahoma, Texas, Arkansas and Louisiana. The raw soil moisture measurements from a total of 220 stations over the four states were obtained from the Oklahoma Mesonet, West Texas Mesonet, USDA Soil Climate Analysis Network and NOAA Climate Reference Network. The measurements have been screened using the Quality Assurance and Quality Control (QAQC) process that is described in Quiring et al. (2016). The measurements were standardized to common depths using the methods described in Zhang et al. (2017) and they are provided at a daily...
Categories: Data;
Tags: Arkansas,
Drought,
Drought, Fire and Extreme Weather,
Louisiana,
Oklahoma, All tags...
South Central CASC,
Texas,
climatologyMeteorologyAtmosphere,
soil moisture, Fewer tags
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Drought indices are widely used for drought quantification. The objective of this study is to introduce a hybrid drought index, the Precipitation Evapotranspiration Difference Condition Index (PEDCI), and to compare its performance in Oklahoma to existing drought indices. The PEDCI is based on a simple water balance model, which accounts for the difference between water supply (precipitation) and water demand (potential evapotranspiration). While it is similar in this respect to the Standardized Precipitation and Evapotranspiration Index (SPEI) and the Palmer Drought Severity Index, it uses a different method to normalize the index in time and space which was inspired by Vegetation Condition Index. The performance...
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Abstract (from https://dl.sciencesocieties.org/publications/sssaj/abstracts/81/3/490): In situ soil moisture measurements have the potential to improve wildfire danger assessments, which often rely on the Keetch–Byram Drought Index (KBDI) as a soil moisture surrogate. However, the relative merits of measured soil moisture and KBDI as indicators of wildfire danger are unknown. Therefore, our objectives were to (i) identify relationships between drought indices (KBDI or fraction of available water capacity, FAW) and wildfire size for 34,939 growing and dormant-season wildfires, (ii) compare relationships between each drought index and wildfire probability for 501 large (≥ 405 ha) growing-season and dormant-season...
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There are a variety of metrics that are used to monitor drought conditions, including soil moisture and drought indices. This study examines the relationship between in situ soil moisture, NLDAS-2 soil moisture, and four drought indices: the standardized precipitation index, the standardized precipitation evapotranspiration index, the crop moisture index, and the Palmer Z index. We evaluate how well drought indices and the modeled soil moisture represent the intensity, variability, and persistence of the observed soil moisture in the southern Great Plains. We also apply the drought indices to evaluate land–atmosphere interactions and compare the results with soil moisture. The results show that the SPI, SPEI, and...
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