Arid
DOI10.1007/s00382-014-2113-9
Dry spell characteristics over India based on IMD and APHRODITE datasets
Sushama, L.1; Ben Said, S.1; Khaliq, M. N.1,2,3; Kumar, D. Nagesh; Laprise, R.1
通讯作者Sushama, L.
来源期刊CLIMATE DYNAMICS
ISSN0930-7575
EISSN1432-0894
出版年2014
卷号43期号:12页码:3419-3437
英文摘要

Selected characteristics of dry spells and associated trends over India during the 1951-2007 period is studied using two gridded datasets: the Indian Meteorological Department (IMD) and the Asian Precipitation-Highly Resolved Observational Data Integration Towards Evaluation of the water resources (APHRODITE) datasets. Two precipitation thresholds, 1 and 3 mm, are used to define a dry day (and therefore dry spells) in this study. Comparison of the spatial patterns of the dry spell characteristics (mean number of dry days, mean number of dry spells, mean and maximum duration of dry spells) for the annual and summer monsoon period obtained with both datasets agree overall, except for the northernmost part of India. The number of dry days obtained with APHRODITE is larger for this region compared to IMD, which is consistent with the smaller precipitation for the region in APHRODITE. These differences are also visible in the spatial patterns of mean and maximum dry spell durations. Analysis of field significance associated with trends, at the level of 34 predefined meteorological subdivisions over the mainland, suggests better agreement between the two datasets in positive trends associated with number of dry days for the annual and summer monsoon period, for both thresholds. Important differences between the two datasets are noted in the field significance associated with the negative trends. While negative trends in annual maximum duration of dry spells appear field significant for the desert regions according to both datasets, they are found field significant for two regions (Punjab and South Interior Karnataka) for the monsoon period for both datasets. This study, in addition to providing information on the spatial and temporal patterns associated with dry spell characteristics, also allows identification of regions and characteristics where the two datasets agree/disagree.


英文关键词Dry spells Gridded precipitation data India Trends
类型Article
语种英语
国家Canada
收录类别SCI-E
WOS记录号WOS:000344861900013
WOS关键词REGIONAL CLIMATE MODEL ; CATALONIA NE SPAIN ; FIELD SIGNIFICANCE ; DAILY PRECIPITATION ; MONSOON RAINFALL ; CANADIAN RIVERS ; EXTREME EVENTS ; TRENDS ; IDENTIFICATION ; REGIMES
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/181408
作者单位1.Univ Quebec, Ctr ESCER, Montreal, PQ H2X 3Y7, Canada;
2.Univ Saskatchewan, Global Inst Water Secur, Saskatoon, SK, Canada;
3.Univ Saskatchewan, Sch Environm & Sustainabil, Saskatoon, SK, Canada
推荐引用方式
GB/T 7714
Sushama, L.,Ben Said, S.,Khaliq, M. N.,et al. Dry spell characteristics over India based on IMD and APHRODITE datasets[J],2014,43(12):3419-3437.
APA Sushama, L.,Ben Said, S.,Khaliq, M. N.,Kumar, D. Nagesh,&Laprise, R..(2014).Dry spell characteristics over India based on IMD and APHRODITE datasets.CLIMATE DYNAMICS,43(12),3419-3437.
MLA Sushama, L.,et al."Dry spell characteristics over India based on IMD and APHRODITE datasets".CLIMATE DYNAMICS 43.12(2014):3419-3437.
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