Open Access Digital Repository of Ministry of Earth Sciences, Government of India

Surface air temperature variability over India during 1901-2007, and its association with enso

Kothawale, DR and Munot, AA and Kumar, KK (2010) Surface air temperature variability over India during 1901-2007, and its association with enso. Climate Research, 42 (2). pp. 89-104.

[img]
Preview
PDF
Surface air.pdf - Published Version

Download (5MB) | Preview

Abstract

Seasonal and annual trends in surface air temperature over India and 7 homogeneous regions (western Himalaya, northwest, north-central, northeast, east coast, west coast and interior peninsula) were assessed during 3 periods: 1901–2007, 1971–2007 and 1998–2007. Indian annual mean (average of maximum and minimum), maximum and minimum temperatures showed significant warming trends of 0.51, 0.72 and 0.27°C 100 yr–1, respectively, during the period 1901–2007. However, accelerated warming was observed in the recent period 1971–2007, mainly due to intense warming in the recent decade 1998–2007. Temperatures (mean, maximum and minimum) increased by about 0.2°C per decade for the period 1971–2007, with a much steeper increase in minimum temperature than maximum temperature. In the most recent decade, maximum temperature was significantly higher compared to the long-term (1901–2007) mean, with a stagnated trend during this period, whereas minimum temperature showed an increasing trend, almost equal to that observed during 1971–2007. On a seasonal scale, pronounced warming trends in mean temperature were observed in winter and monsoon seasons, and a significant influence of El Niño Southern Oscillation events on temperature anomalies during certain seasons across India was observed. The composites of maximum and minimum temperatures of El Niño years showed positive anomalies during monsoon, post-monsoon and subsequent year winter and pre-monsoon seasons. However, statistically significant positive anomalies were observed only during monsoon and post-monsoon seasons over large areas of the country. The composite temperature anomalies of La Niña years were almost opposite to El Niño composites: the negative temperature anomalies associated with La Niña events persisted from the current monsoon season to the subsequent year pre-monsoon season

Item Type: Article
Additional Information: Copyright of this article belongs to Inter-Research
Uncontrolled Keywords: Annual mean; Annual trends; Average temperature; Decadal average temperature; East coast; Himalayas; Homogeneous regions; Maximum temperature; Mean temperature; Monsoon season; Negative temperatures; Post-monsoon; Pre-monsoon; Seasonal scale; Southern Oscillation; Surface air temperature variability; Surface air temperatures; Temperature anomaly; Temperature trends; West coast, Atmospheric pressure; Atmospheric temperature; Global warming; Lasers; Nickel compounds, Atmospheric thermodynamics, air temperature; El Nino-Southern Oscillation; global warming; La Nina; regional climate; temperature anomaly; temperature effect, Himalayas; India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 22 May 2015 11:26
Last Modified: 22 May 2015 11:26
URI: http://moeseprints.incois.gov.in/id/eprint/787

Actions (login required)

View Item View Item