NDLI: Influence of the intraseasonal variability on heat waves in subtropical South America

Content Provider	Springer Nature Link
Author	Cerne, S. B. Vera, C. S.
Copyright Year	2010
Abstract	The influence of the intraseasonal variability on heat wave development over subtropical South America during austral summer is analyzed. The role of the South Atlantic Convergence Zone (SACZ) on this development is documented. Results show that intraseasonal variability can explain on average at least 32% of summer temperature variance. Moreover, 73% of the heat waves in subtropical South America develop in association with an active SACZ. The analysis of pentad maps shows that warm conditions in the region under study develop in association with the strengthening of an anticyclonic anomaly, which is discernible over the subtropical regions at least 15 days before temperature peak occurrence. That circulation anomaly is embedded in a large-scale Rossby wave train extending along the South Pacific Ocean that is linked to convection anomalies at the equatorial western and central Pacific Ocean. In addition, the development of the anticyclonic circulation over subtropical South America appears to be strengthened by the subsidence conditions promoted by the active SACZ, which result in temperature rise in the subtropical region under relatively dry conditions. On the other hand, during the last 2 days of evolution, SACZ activity weakens and the progressive temperature rise in the region is dominated by warmer and moister air being anomalously advected from the north. Results confirm the important role that SACZ activity on intraseasonal time scales has in inducing persistent circulation anomalies at the subtropical regions that can result in the development of persistent heat waves, and very extreme daily temperature.
Starting Page	2265
Ending Page	2277
Page Count	13
File Format	PDF
ISSN	09307575
Journal	Climate Dynamics
Volume Number	36
Issue Number	11-12
e-ISSN	14320894
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-04-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Intraseasonal variability South America Temperature Heat waves SACZ Warm season Meteorology/Climatology Geophysics/Geodesy Oceanography
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Intraseasonal variability in subtropical South America as depicted by precipitation data

Intraseasonal variability in South America during the cold season

Moisture transport and intraseasonal variability in the South America monsoon system

Impact of land surface processes on the South American warm season climate

Influence of sea surface temperature on the intraseasonal variability of the South China Sea summer monsoon

Summer precipitation variability over South America on long and short intraseasonal timescales

Simulation of the intraseasonal variability over the Eastern Pacific ITCZ in climate models

Tropical intraseasonal rainfall variability in the CFSR

Intraseasonal oscillations of the monsoon circulation over South Asia

Influence of the intraseasonal variability on heat waves in subtropical South America

Similar Documents

Intraseasonal variability in subtropical South America as depicted by precipitation data

Intraseasonal variability in South America during the cold season

Moisture transport and intraseasonal variability in the South America monsoon system

Impact of land surface processes on the South American warm season climate

Influence of sea surface temperature on the intraseasonal variability of the South China Sea summer monsoon

Summer precipitation variability over South America on long and short intraseasonal timescales

Simulation of the intraseasonal variability over the Eastern Pacific ITCZ in climate models

Tropical intraseasonal rainfall variability in the CFSR

Intraseasonal oscillations of the monsoon circulation over South Asia

Influence of the intraseasonal variability on heat waves in subtropical South America