Evaluation of a composite drought index to identify seasonal drought and its associated atmospheric dynamics in Northern Punjab, Pakistan
نویسندگان
چکیده
Drought is one of the most devastating climate extremes in terms its spatial extent and intensity. Rainfed areas are extremely vulnerable to drought, but effective monitoring may lessen impact such events. This study developed a composite drought index (CDI) for assessing seasonal droughts rainfed Potwar Plateau Pakistan, using remotely sensed observed meteorological datasets. We identified four severe-to-extreme periods Rabi season (wheat; 2000–01, 2001–02, 2009–10, 2011–12) events Kharif (maize; 2000–2002 2009). An intense agro-meteorological was experienced 2000, which reduced wheat maize yields ?54.6% ?29.9%, respectively. Our analysis revealed that these conditions could be explained by vertically integrated moisture flux divergence (MFD), transport, total precipitable water (TPW) anomalies. For example, presence strong MFD anomaly over area responsible preventing transport from Arabian Sea Bay Bengal, resulting dry conditions. The here can effectively monitor areas, help inform strategies • highly drought. CDI performs better Agro-meteorological rain-fed areas. severe extreme both seasons. Associated with large-scale circulations droughts.
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ژورنال
عنوان ژورنال: Journal of Arid Environments
سال: 2021
ISSN: ['1095-922X', '0140-1963']
DOI: https://doi.org/10.1016/j.jaridenv.2020.104332