نتایج جستجو برای: palmer drought severity index

تعداد نتایج: 561124  

2012
Christopher R. Schwalm Christopher A. Williams Kevin Schaefer Dennis Baldocchi T. Andrew Black Allen H. Goldstein Beverly E. Law Walter C. Oechel Kyaw Tha Paw Russel L. Scott

Fossil fuel emissions aside, temperate North America is a net sink of carbon dioxide at present1–3. Year-to-year variations in this carbon sink are linked to variations in hydroclimate that affect net ecosystem productivity3,4. The severity and incidence of climatic extremes, including drought, have increased as a result of climate warming5–8. Here, we examine the effect of the turn of the cent...

2008
Xiaohong Liu Xuemei Shao Lily Wang Eryuan Liang Dahe Qin Jiawen Ren

[1] The stable carbon isotope composition (dC) of tree rings in a climate-sensitive region can provide a retrospective view of changes in environment and climate. Here, we report on the development of the first annually resolved dC tree ring chronology obtained from natural forests on the northeastern Tibetan Plateau. Climate data show a warming trend and more frequent droughts occurring in the...

2017
A. Taeb J. T. Reager M. Turmon V. Chandrasekaran

The recent California drought has highlighted the potential vulnerability of the state’s water management infrastructure to multiyear dry intervals. Due to the high complexity of the network, dynamic storage changes in California reservoirs on a state-wide scale have previously been difficult to model using either traditional statistical or physical approaches. Indeed, although there is a signi...

Journal: :Earth Science Informatics 2015
Dimitris Tigkas Harris Vangelis George Tsakiris

Drought is a complex phenomenon which can be characterised mainly by its severity, duration and areal extent. Among these three dimensions, drought severity is the key factor which can be used for drought analysis. Drought indices are typically used to assess drought severity in a meaningful way. DrinC (Drought Indices Calculator) is a software package which was developed for providing a simple...

Journal: :Journal of Geographical Sciences 2021

This study uses two forms of the Palmer Drought Severity Index (PDSI), namely PDSI_TH (potential evapotranspiration estimated-by Thornthwaite equation) and PDSI_PM estimated by FAO Penman-Monteith equation), to characterize meteorological drought trends during 1960–2016 in Loess Plateau (LP) its four subregions. By designing a series numerical experiments, we mainly investigated various climati...

Journal: :J-ENSITEC 2022

Drought is a natural event that very influential on the availability of water reserves in soil, both needed for agricultural purposes and human needs. The Irrigation Areas (DI) conducted by study are Pandanduri-Swangi, Rutus, Terara Temusik which located Palung River Basin. This Analysis includes Rainfall, Regional Evaporation, calculation drought Palmer Severity Index (PDSI) method. Then do co...

Journal: :Forests 2022

The 2009/2010 extreme drought in southwest China (SWC) was a “once-in-a-century” event, which caused unprecedented damage to the regional ecology and socioeconomic development. event provided chance explore resilience of vegetation growth productivity drought. Here, we used self-calibrating Palmer severity index (scPDSI) describe characteristics Vegetation indices, including normalized differen...

Journal: :Earth’s Future 2023

The simultaneous occurrence of droughts and floods in neighboring regions amplifies the threats posed by individually. Nonetheless, few studies have been conducted to investigate drought flood events. Here we explore spatiotemporal characteristics shift pattern pluvials over Eastern China from a three-dimensional perspective, using self-calibrated Palmer Drought Severity Index Climate Research ...

Journal: :Physical Geography 2022

Droughts are a natural, recurrent climate extreme that can inflict long-lasting devastation on natural ecosystems and socio-economic sectors. Unlike other hazards, drought onset is insidious often affects greater spatial extent over prolonged temporal scale. In the United States evolution of its impacts typically region-specific intensified precipitation variability may obscure how manifest. th...

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