The goal of the WMO Expert Meeting on Agricultural Drought Indices was to move forward in the selection of a single drought index that would be used worldwide in the assessment of agricultural drought and its severity. This chapter discusses the challenges in identifying a single index to accomplish this task. Given the complexities of drought and its diverse sectoral impacts, this is a formida...

This study presents an assessment of projection and uncertainty drought characteristics (frequency DF, area Da) using three indices (Palmer Drought Severity Index, PDSI; Standardized Precipitation SPI; Evapotranspiration SPEI) in the humid subtropical Pearl River basin southern China during period 2021–2050. The is based on 13 CMIP5 general circulation models (GCMs) under Representative Concent...

This paper examines the role of soil moisture in quantifying drought through the development of a drought index using observed and modeled soil moisture. In Nebraska, rainfall is received primarily during the crop-growing season and the supply of moisture from the Gulf of Mexico determines if the impending crop year is either normal or anomalous and any deficit of rain leads to a lack of soil m...

• Stable carbon isotope ratio (? 13 C) in latewood of tree rings is a better drought proxy than tree-ring width (TRW). Quercus cerris exhibited tolerance (<? robur . and have different ? C response to drought, while their TRW comparable. correlate more strongly with indices raw meteorological data. Tree-ring (TRW), stable intrinsic water use efficiency (iWUE) data set chronologies were built fo...

Zambia recently experienced several environmental threats from climate change such as droughts, temperature rise and occasional flooding they all affect agricultural sustainability people wellbeing through negative effects on plants growing crops. This paper is aimed at showing variations in parameters spatial variability trends different regions of Zambia's key areas (Zambezi River tributaries...

Previous research on the effects of drought vegetation productivity seldom distinguished different responses ecosystems to under management practices and land use systems. Studies investigating whether irrigation can buffer negative impacts usually used discontinuous yield data in distribution. In this study, trends farmlands drylands northern China (DNC) from 2000 2018 were studied using self-...

abstract this research evaluates climate change effects on drought severity in the region of gharesou, iran. the standardized precipitation index (spi) has been used for estimation of drought severity. a geographical information system is applied for calculating the mean areal precipitation time series from 11 meteorological stations, in and out of the area for the hydrological period jan 1971-...

Wildfire predictions provide useful information for fire management planning and implementation. Temperature precipitation have been used as the primary meteorological predictors wildfires in China. This study is to improve prediction skills of long-range (monthly, seasonal, annual) China by identifying other important predictors. Provincial data during 1999–2020 were calculate correlations bet...

Strong associations between observed climate anomalies at lags of one season to years in advance and normalized area burned in the western U.S. wildfire season have recently been described using a newly compiled comprehensive gridded western regional fire history (Westerling et al 2001b). Earlier studies of fire scar dendrochronologies and local fire histories have demonstrated that large-scale...

We compared high-resolution reconstructions of peatland water-table depth at two raised bogs in the western Great Lakes region separated by ∼1000 km. The sites included Minden Bog in southeastern Michigan and Hole-in-the-Bog in north-central Minnesota. Our objectives were to 1) determine whether large, decadal to multidecadal droughts of the past 2000 yrs were spatially and temporally coherent ...