干旱区生态环境知识资源中心(Arid): Long-term (2001-2020) trend analysis of temperature and rainfall and drought characteristics by in situ measurements at a tropical semi-arid station from southern peninsular India

Arid

DOI	10.1002/joc.7783
	Long-term (2001-2020) trend analysis of temperature and rainfall and drought characteristics by in situ measurements at a tropical semi-arid station from southern peninsular India
	Thotli, Lokeswara Reddy; Gugamsetty, Balakrishnaiah; Kalluri, Raja Obul Reddy; Tandule, Chakradhar Rao; Kotalo, Rama Gopal; Akkiraju, Bhavyasree; Lingala, Siva Sankara Reddy
通讯作者	Kotalo, RG
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
EISSN	1097-0088
出版年	2022
卷号	42 期号:16 页码:8928-8949
英文摘要	With the effects of climate change prevailing worldwide, it is essential to understand the long-term rainfall and temperature trends at regional scales to plan for adaptation strategies. Investigating the temporal dynamics of meteorological variables in climate-induced changes, particularly in rain-fed agriculture countries such as India, is needful. The present study focused on the temporal variation of rainfall and temperature trends to analyse the drought characteristics over the past 20 years (2001-2020) using ground-based Automatic Weather Station (AWS) data at a semi-arid station Anantapur in southern peninsular India. The seasonal maximum mean temperature (T-mean) was observed in summer (32.20 +/- 1.36 degrees C), followed by the monsoon (29.08 +/- 1.02 degrees C), postmonsoon (26.45 +/- 2.44 degrees C), and winter (25.45 +/- 1.01 degrees C) during the study period. The Mann-Kendall trend test result showed the decreasing trend in seasonal mean temperature during the drying period (winter [-0.069 degrees C center dot year(-1)] and summer [-0.081 degrees C center dot year(-1)]) and increasing trend in the wetting period (monsoon [0.012 degrees C center dot year(-1)] and postmonsoon [0.034 degrees C center dot year(-1)]). On the other hand, the seasonal rainfall decreases in the postmonsoon (-2.276 mm center dot year(-1)) while increasing in winter (0.5 mm center dot year(-1)), summer (2.137 mm center dot year(-1)), and monsoon (6.901 mm center dot year(-1)) seasons. The annual trends of minimum, maximum, and mean monthly temperatures decrease at the rate of -0.121, -0.123, and -0.022 degrees C center dot year(-1), respectively, while the rainfall increases at the rate of 8.979 mm center dot year(-1). Furthermore, the temporal evolution of meteorological drought characteristics was estimated with the help of the standardized precipitation index (SPI) and standardized precipitation evapotranspiration index (SPEI) on multiple timescales ranging from 1 to 24 months on a monthly basis during the study period. The 24-month SPI values showed that 1 severely dry and the 29 moderately dry long-term drought events were observed. From 24-month SPEI, a total of 15 severely dry and 20 moderately dry long-term droughts were observed during the study period. The severely dry years were observed in 2002 and 2003, while the wettest periods were 2007 and 2010. Both indices are identified as more severe dry periods from 2002 to 2006 and 2013 to 2017 than rest periods. Also, a significant decreasing tendency of droughts was observed in both indices. The SPI values are compared with El Nino-Southern Oscillation (ENSO) and normalized difference vegetation index (NDVI) and found that the SPI versus ENSO index negatively correlates with the coefficient of -0.58 significantly, while the SPI versus NDVI correlation is insignificant. The study region converted to wetter conditions during the last 20 years.
英文关键词	ENSO NDVI rainfall semi-arid region SPEI SPI temperature trend analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000825958800001
WOS关键词	CLIMATE-CHANGE ; RIVER-BASIN ; SUMMER MONSOON ; VARIABILITY ; PRECIPITATION ; INDEXES ; SPEI ; COEFFICIENT ; EVOLUTION ; AEROSOLS
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/2XILL650/393134
推荐引用方式 GB/T 7714	Thotli, Lokeswara Reddy,Gugamsetty, Balakrishnaiah,Kalluri, Raja Obul Reddy,et al. Long-term (2001-2020) trend analysis of temperature and rainfall and drought characteristics by in situ measurements at a tropical semi-arid station from southern peninsular India[J],2022,42(16):8928-8949.
APA	Thotli, Lokeswara Reddy.,Gugamsetty, Balakrishnaiah.,Kalluri, Raja Obul Reddy.,Tandule, Chakradhar Rao.,Kotalo, Rama Gopal.,...&Lingala, Siva Sankara Reddy.(2022).Long-term (2001-2020) trend analysis of temperature and rainfall and drought characteristics by in situ measurements at a tropical semi-arid station from southern peninsular India.INTERNATIONAL JOURNAL OF CLIMATOLOGY,42(16),8928-8949.
MLA	Thotli, Lokeswara Reddy,et al."Long-term (2001-2020) trend analysis of temperature and rainfall and drought characteristics by in situ measurements at a tropical semi-arid station from southern peninsular India".INTERNATIONAL JOURNAL OF CLIMATOLOGY 42.16(2022):8928-8949.