Dissertation > Astronomy,Earth Sciences > Atmospheric science (meteorology ) > Climatology > Climate change, historical climate

Nearly 50 years of climate change and its heat island effect in Chengdu

Author HaoLiPing
Tutor HeJinHai;FangZhiFang
School Nanjing University of Information Engineering
Course Meteorology
Keywords Tests and analysis Shifts and changes Seasonal changes Designate temperature Cities for Climate Urbanization
CLC P467
Type Master's thesis
Year 2006
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Chengdu and its weather station under the jurisdiction of the 13 districts (city) County nearly 50 years of temperature , precipitation, relative humidity , cloud cover , fog days meteorological factors such as information and Chengdu city environmental changes ( such as urban built-up areas area , total industrial emissions , as well as demographic changes , etc.) , filtering applications Gauss nine , the slope of the interannual variability analysis , two sets of sample mean differences significant test of MK test statistics , analysis of Chengdu for nearly 50 years climate change characteristics . The results show that , in the late 1980s to the early nineties , Chengdu climate changes in the turning point of the heat island effect and arid island effect , which has very close links with the urbanization of Chengdu . Chengdu, temperature changes in 50 years that the the Chengdu climate warming gradually , Chengdu, the annual average temperature occurred in 1986 after the turning-point change in a rapid and sustained upward trend has reached a very high value in the past 53 years . Further Chengdu, and under the jurisdiction of 13 districts ( city) County 1971-2003 33 years climate average temperature data analysis the Chengdu temperature seasonal variation , the results show that to Chengdu, the annual mean temperature mutation 1996 , the 33 -year climate average temperature is divided into two sections :1971- 1995 (period 1 ) and 1996-2003 (period 2 ) , period 2 temperature greater than period 1 , and the spring , summer arrival time relative period in advance , autumn , winter lagging behind in summer to extend the shortened winter ; this result also proves the fact that the the Chengdu climate gradually warming .

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