TITLE

Effect of global warming in Thailand

AUTHOR(S)
Vongvisessomjai, Suphat
PUB. DATE
July 2010
SOURCE
Songklanakarin Journal of Science & Technology;Jul/Aug2010, Vol. 32 Issue 4, p431
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The earth absorbs much radiation from the sun to warm the atmosphere, the land, and the oceans. This energy is re-radiated back into space. In the past, the thermal budget of the earth is more or less balanced, with radiation from the sun on par with thermal radiation from the earth. With increasing greenhouse gases in the atmosphere, some of the thermal radiation is absorbed by these gases resulting in an increase of global mean surface temperature, melting of polar ices and thus contributing to a rising of sea level. However, sea-level changes depend upon four main processes: 1) Glacio-eustasy, 2) Emergence/subsidence of land, 3) Man-made activities, and 4) Ocean-atmosphere effects. The assessment report of the Inter-governmental Panel on Climate Change (IPCC, 1990), which was based on past data in Europe and the USA, including the North Atlantic Ocean, published a mean temperature of 14�C and an actual increase of 1�C in the last century, plus an increase of CO2 from 370 ppmv to 550 ppmv, and a three-fold temperature increase of 3�C in this century. All these changes are projecting a sea level rise (SLR) of 31-110 cm per century on global scale, which was in fact applicable to the North Atlantic. The assessment report of the IPCC Working Group I (1996) has realized that differential SLR occurs due to different geographical conditions. It identified ten regions on earth and compared the actual climate change to what it was postulated to be, and came up with SLR of 15-95 cm per century. The assessment report of the IPCC Working Group II (2001) employed improved data obtained from tide gauges and satellite images as well as mathematical model results with the most convincing evidence in the North Atlantic, and it concluded an SLR of 9-88 cm per century. But it had, however, noted a lack of data in the Pacific and Indian Ocean. The assessment report of the IPCC Summary for Policy Makers (SPM, 2007) that included six different arctic and antarctic climate science scenarios reported relatively lower value of 18-59 cm per century. The North Atlantic that is surrounded by glaciers might see a SLR due to ice melting related to an increase of the temperature in the Atlantic Ocean. Nevertheless, the lack of data on global warming in the tropics especially in the Pacific and the Indian Oceans, which have no glaciers, might put a different view on the conclusions derived from temperature and arctic data. Six decades of comprehensive information from the Gulf of Thailand regarding oceanographical and meteorological data is revealing a much lower SLR. The mean monthly sea levels in six decades at Sattahip and Ko Lak showed no increasing trend, while those rises at Samut Prakan and Samut Sakhon are due to land subsidence from excessive groundwater pumping.
ACCESSION #
53849329

 

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