Northward Propagation of the Intertropical Convergence Zone and Strengthening of Indian Summer Monsoon Rainfall
dc.contributor.author | Hari, V | |
dc.contributor.author | Villarini, G | |
dc.contributor.author | Karmakar, S | |
dc.contributor.author | Wilcox, LJ | |
dc.contributor.author | Collins, M | |
dc.date.accessioned | 2021-05-28T06:48:46Z | |
dc.date.issued | 2020-11-20 | |
dc.description.abstract | Since 2002, there has been a clear increase in Indian summer monsoon rainfall (ISMR). We demonstrate that this increase is associated with a change in the dynamics of the Intertropical Convergence Zone (ITCZ). Using a recently released reanalysis product from 1980–2016, we show that the ITCZ has strengthened and propagated northward since 2002. Analysis of the total energy budget reveals an increase in energy divergence and atmospheric diabatic heating, which is consistent with the changes in the ITCZ. Although global aerosol optical depth shows a significant positive trend during 1980–2016, it has declined over many parts of India since 2002. We put forward the hypothesis that this is the driver of the changing characteristics of the ITCZ. Our results suggest that changes in the dynamics of the ITCZ, together with changes in the energy/moisture budget, are responsible for the strengthening of ISMR since 2002, consistent with the emergence of a greenhouse gas-induced signal. | en_GB |
dc.description.sponsorship | Natural Environment Research Council (NERC) | en_GB |
dc.description.sponsorship | Natural Environment Research Council (NERC) | en_GB |
dc.description.sponsorship | Fulbright-Kalam climate fellowship | en_GB |
dc.identifier.citation | Vol. 47 (23), article e2020GL089823 | en_GB |
dc.identifier.doi | 10.1029/2020GL089823 | |
dc.identifier.grantnumber | NE/S004890/1 | en_GB |
dc.identifier.grantnumber | NE/S004645/1 | en_GB |
dc.identifier.grantnumber | 2338/FKPDR/2018 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/125852 | |
dc.language.iso | en | en_GB |
dc.publisher | Wiley / American Geophysical Union | en_GB |
dc.rights | ©2020. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. | en_GB |
dc.title | Northward Propagation of the Intertropical Convergence Zone and Strengthening of Indian Summer Monsoon Rainfall | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2021-05-28T06:48:46Z | |
dc.identifier.issn | 0094-8276 | |
dc.description | This is the final version. Available from Wiley via the DOI in this record. | en_GB |
dc.description | Data used here can be downloaded from the following: CRU (https://crudata.uea.ac.uk/cru/data/hrg/), ERA5 (https://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/era5), MEERA2 (https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/data_access/), and total aerosol ERF (https://climexp.knmi.nl/getindices.cgi?WMO=LeedsData/total_aerosol_ERF&id=). | en_GB |
dc.identifier.journal | Geophysical Research Letters | en_GB |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2020-11-11 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2020-11-11 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2021-05-28T06:42:40Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2021-05-28T06:51:07Z | |
refterms.panel | B | en_GB |
refterms.depositException | publishedGoldOA |
Files in this item
This item appears in the following Collection(s)
Except where otherwise noted, this item's licence is described as ©2020. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.