Linkage between global sea surface temperature and hydroclimatology of a major river basin of India before and after 1980
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The frequent occurrence of flood and drought worldwide has drawn attention to assessing whether the hydroclimatology of major river basins has changed. The Mahanadi river basin (MRB) is the major source of fresh water for both Chattisgarh and Odisha states (71 million people approximately) in India. The MRB (141 600 km 2 area) is one of the most vulnerable to climate change and variations in temperature and precipitation. In recent years, it has repeatedly faced adverse hydrometeorological conditions. Large-scale ocean–atmospheric phenomena have a substantial influence on river hydroclimatology. Hence global sea surface temperature (SST) linkage with the precipitation and surface temperature of the MRB was analyzed over the period 1950–2012. Significant changes in seasonal correlation patterns were witnessed from 1950–1980 (PR-80) to 1981–2012 (PO-80). The correlation was higher during PR-80 compared to PO-80 between the El Niño region SST versus the maximum temperature ( T max ) in all seasons except the pre-monsoon season and the minimum temperature ( T min ) in all seasons except the monsoon season. However, precipitation correlation changes are not prominent. Like the SST, the correlation patterns of sea level pressure with precipitation, T max and T min shifted conspicuously from PR-80 to PO-80. These shifts could be related to change in Pacific decadal SST patterns and anthropogenic effects. Fingerprint-based detection and attribution analysis revealed that the observed changes in T min (pre-monsoon and monsoon season) during the second half of the 20th century cannot be explained solely by natural variability and can be attributed to an anthropogenic effect.
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There is robust evidence confirming the role of human-induced climate change in driving increases in extreme heat.
“and there is robust evidence confirming the role of human-induced climate change in driving them (Wehner et al 2016, Pattanayak et al 2017, Wang et al 2017, Dileepkumar et al 2018, 2021, van Oldenborgh et al 2018, Seong et al 2021).”
From Attribution of 2022 early-spring heatwave in India and Pakistan to climate change: lessons in assessing vulnerability and preparedness in reducing impacts (2023) · cites this paper as Pattanayak et al 2017
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- Authors
- Pattanayak, S., Nanjundiah, R. S., & Kumar, D. N.
- Affiliations
- Indian Institute of Science Bangalore (IN)
- Indian Institute of Tropical Meteorology (IN)
- Corresponding author
- Pattanayak, Sonali
- Venue
- Environmental Research Letters
- Publisher
- IOP Publishing
- Published
- 2017-11-22
- Volume
- 12
- Issue
- 12
- Pages
- 124002
- ISSN
- 1748-9326 (ISSN-L)
- OpenAlex
- W2766073863
- Cited by
- 19
- References
- 34
- Citations by year
- 2025: 1 · 2024: 2 · 2023: 3 · 2022: 2 · 2021: 3 · 2020: 3 · 2019: 3 · 2018: 2
- FWCI
- 1.52
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Environmental Research Letters (publishedVersion, cc-by)
- NOT FOUND REPOSITORY (Indian Institute of Science Bangalore) (acceptedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- U.S. Department of Energy
- Indian Institute of Science
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
- Physical Sciences › Environmental Science › Global and Planetary Change › Hydrology and Drought Analysis
- Physical Sciences › Environmental Science › Water Science and Technology › Hydrology and Watershed Management Studies
- Keywords
- sea surface temperature, Mahanadi basin, hydroclimatology, El Niño, Pacific Decadal Oscillation, sea level pressure, precipitation, temperature trends, climate change attribution, anthropogenic forcing, droughts and floods
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