Differential Heating in the Indian Ocean Differentially Modulates Precipitation in the Ganges and Brahmaputra Basins

Metadata Updated: November 12, 2020

This dataset provides an assessment of the differential heating in the Indian Ocean (IO) and the subsequent modulation of the Ganges and Brahmaputra precipitation. Indo-Pacific sea surface temperature dynamics play a prominent role in Asian summer monsoon variability. Using 28 years of remote sensing observations, we demonstrate that (i) the tropical west-east differential heating in the IO influences the Ganges precipitation and (ii) the north-south differential heating in the IO influences the Brahmaputra precipitation. The El Niño phase induces warming in the warm pool of the IO and exerts more influence on Ganges precipitation than Brahmaputra precipitation. The analyses indicate that both the magnitude and position of the sea surface temperature (SST) anomalies in the IO are important drivers for precipitation dynamics that can be effectively summarized using two new indices, one tuned for each basin. The dataset consists of the spatial structure of the SST anomalies in the IO, the Ganges and the Brahmaputra precipitation dynamics, and the variability in wind, outgoing longwave radiation, and geopotential height anomalies, as well as the new geographic zones to compute west-east and north-south zonal differences in SST anomalies. The purpose of the analyses was to understand the forcing of the precipitation in these river basins associated with changes in acquired energy during different climate modes in the Indo-Pacific.

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License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date October 25, 2016
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) October 25, 2016 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from DOI Open Data

Additional Metadata

Resource Type Dataset
Metadata Date October 25, 2016
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) October 25, 2016 (publication)
Responsible Party U.S. Geological Survey, CLIMATE & LAND-USE (Point of Contact)
Contact Email
Access Constraints Use Constraints: None. Users are advised to read the data set's metadata thoroughly to understand appropriate use and data limitations., Access Constraints: None. Please see 'Distribution Info' for details.
Bbox East Long 152.475
Bbox North Lat 50.125
Bbox South Lat -52.375
Bbox West Long 4.975
Coupled Resource
Frequency Of Update notPlanned
Licence Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Distributor assumes no liability for misuse of data.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1982-01-01
Temporal Extent End 2010-12-31

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