干旱区生态环境知识资源中心(Arid): Spatiotemporal Characteristics and Trend Analysis of Two Evapotranspiration-Based Drought Products and Their Mechanisms in Sub-Saharan Africa

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DOI	10.3390/rs13030533
	Spatiotemporal Characteristics and Trend Analysis of Two Evapotranspiration-Based Drought Products and Their Mechanisms in Sub-Saharan Africa
	Nooni, Isaac Kwesi; Hagan, Daniel Fiifi T.; Wang, Guojie; Ullah, Waheed; Li, Shijie; Lu, Jiao; Bhatti, Asher Samuel; Shi, Xiao; Lou, Dan; Prempeh, Nana Agyemang; Lim Kam Sian, Kenny T. C.; Dzakpasu, Mawuli; Amankwah, Solomon Obiri Yeboah; Zhu, Chenxia
通讯作者	Wang, GJ (corresponding author), Nanjing Univ Informat Sci Technol, Sch Geog Sci, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Peoples R China.
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2021
卷号	13 期号:3
英文摘要	Drought severity still remains a serious concern across Sub-Saharan Africa (SSA) due to its destructive impact on multiple sectors of society. In this study, the interannual variability and trends in the changes of the self-calibrating Palmer Drought Severity Index (scPDSI) based on the Penman-Monteith (scPDSI(PM)) and Thornthwaite (scPDSI(TH)) methods for measuring potential evapotranspiration (PET), precipitation (P), normalized difference vegetation index (NDVI), and sea surface temperature (SST) anomalies were investigated through statistical analysis of modeled and remote sensing data. It was shown that scPDSI(PM) and scPDSI(TH) differed in the representation of drought characteristics over SSA. The regional trend magnitudes of scPDSI in SSA were 0.69 (scPDSI(PM)) and 0.2 mm/decade (scPDSI(TH)), with a difference in values attributed to the choice of PET measuring method used. The scPDSI and remotely sensed-based anomalies of P and NDVI showed wetting and drying trends over the period 1980-2012 with coefficients of trend magnitudes of 0.12 mm/decade (0.002 mm/decade). The trend analysis showed increased drought events in the semi-arid and arid regions of SSA over the same period. A correlation analysis revealed a strong relationship between the choice of PET measuring method and both P and NDVI anomalies for monsoon and pre-monsoon seasons. The correlation analysis of the choice of PET measuring method with SST anomalies indicated significant positive and negative relationships. This study has demonstrated the applicability of multiple data sources for drought assessment and provides useful information for regional drought predictability and mitigation strategies.
英文关键词	droughts NDVI CHIRPS precipitation anomalies potential evapotranspiration (PET) self-calibrating Palmer Drought Severity Index sub-Saharan Africa
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000615467400001
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
来源机构	南京信息工程大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348135
作者单位	[Nooni, Isaac Kwesi; Lim Kam Sian, Kenny T. C.] Nanjing Univ Informat Sci Technol, Binjiang Coll, 333 Xishan Rd, Wuxi 214105, Jiangsu, Peoples R China; [Nooni, Isaac Kwesi; Hagan, Daniel Fiifi T.; Wang, Guojie; Ullah, Waheed; Li, Shijie; Lu, Jiao; Bhatti, Asher Samuel; Shi, Xiao; Lou, Dan; Amankwah, Solomon Obiri Yeboah; Zhu, Chenxia] Nanjing Univ Informat Sci Technol, Sch Geog Sci, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Peoples R China; [Shi, Xiao] Meteorol Serv Ctr, Jiangsu Meteorol Bur, Nanjing 210008, Peoples R China; [Prempeh, Nana Agyemang] Univ Energy & Nat Resources, Sch Geosci, Dept Geog Sci, POB 214, Sunyani, Ghana; [Lim Kam Sian, Kenny T. C.] Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Nanjing 210044, Peoples R China; [Dzakpasu, Mawuli] Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Key Lab Northwest Water Resources Environm & Ecol, 13 Yanta Rd, Xian 710055, Peoples R China
推荐引用方式 GB/T 7714	Nooni, Isaac Kwesi,Hagan, Daniel Fiifi T.,Wang, Guojie,et al. Spatiotemporal Characteristics and Trend Analysis of Two Evapotranspiration-Based Drought Products and Their Mechanisms in Sub-Saharan Africa[J]. 南京信息工程大学,2021,13(3).
APA	Nooni, Isaac Kwesi.,Hagan, Daniel Fiifi T..,Wang, Guojie.,Ullah, Waheed.,Li, Shijie.,...&Zhu, Chenxia.(2021).Spatiotemporal Characteristics and Trend Analysis of Two Evapotranspiration-Based Drought Products and Their Mechanisms in Sub-Saharan Africa.REMOTE SENSING,13(3).
MLA	Nooni, Isaac Kwesi,et al."Spatiotemporal Characteristics and Trend Analysis of Two Evapotranspiration-Based Drought Products and Their Mechanisms in Sub-Saharan Africa".REMOTE SENSING 13.3(2021).