Assessment of trends and variability in surface air temperature on multiple high-resolution datasets over the Indochina Peninsula
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The climatological means and surface air temperature (SAT) trends of the Indochina Peninsula (ICP) are being analyzed on a yearly and seasonal basis using a newly published observation dataset (SA-OBS). The SAT for the period 1981 to 2010 shows a north-south gradient over the ICP, with the highest mean annual temperature in the central plain and the lowest in the northern mountain region. In addition, over the past 30 years, the ICP has been undergoing a significant warming trend of 0.37 °C/decade. The seasonal mean SAT fluctuations are significant in the dry seasons compared to the wet seasons, with a rapid increase in JFM (January to March) and OND (October to December). Further, comparisons are made using SA-OBS and the other observation (CRU, GHCN_CAMS, DEL) or reanalysis (ERA-20C, CERA-20C, ERA-Interim, JRA-55) datasets. The result shows (i) that the SA-OBS dataset can capture the spatial distributions and temporal patterns reasonably well throughout the ICP on annual and seasonal scales. (ii) CERA-20C is very similar to SA-OBS in replicating the annual mean SAT over the ICP, suggesting that the ECMWF’s coupled data assimilation system (CERA) could obviously improve the temperature estimates in that region. (iii) That significant differences, however, still exist between observations and reanalyses in annual and seasonal trends. These discrepancies need to be taken into account to study climate change and variability or to assess regional climate models with focus on the ICP.
This study acknowledges the support of the National Natural Science Foundation of China (91537214, 41575104), the Max Planck Fellow Group, the Scientific Research Foundation of Chengdu University of Information Technology (KYTZ201730), the Open Research Fund Program of Plateau Atmosphere and Environment Key Laboratory of Sichuan Province (PAEKL-2018-Y1), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
- Berrisford P, Dee DP, Fielding K, Fuentes M, Kållberg P, Kobayashi S, Uppala SM (2009) ‘The ERA-Interim Archive’. ERA Report Series, No.1. ECMWF, ReadingGoogle Scholar
- Dee DP, Uppala SM, Simmons AJ, Berrisford P, Poli P, Kobayashi S, Andrae U, Balmaseda MA, Balsamo G, Bauer P, Bechtold P, Beljaars ACM, van de Berg L, Bidlot J, Bormann N, Delsol C, Dragani R, Fuentes M, Geer AJ, Haimberger L, Healy SB, Hersbach H, Hólm EV, Isaksen L, Kållberg P, Köhler M, Matricardi M, McNally AP, Monge-Sanz BM, Morcrette JJ, Park BK, Peubey C, de Rosnay P, Tavolato C, Thépaut JN, Vitart F (2011) The ERA-interim reanalysis: configuration and performance of the data assimilation system. Q J R Meteorol Soc 137(656):553–597CrossRefGoogle Scholar
- Hersbach H, Brönnimann S, Haimberger L, Mayer M, Villiger L, Comeaux J, Simmons A, Dee D, Jourdain S, Peubey C, Poli P, Rayner N, Sterin AM, Stickler A, Valente MA, Worley SJ (2017) The potential value of early (1939-1967) upper-air data in atmospheric climate reanalysis. Q J R Meteorol Soc 143(704):1197–1210CrossRefGoogle Scholar
- IPCC (2013) Summary for policymakers of climate change 2013: the physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, CambridgeGoogle Scholar
- Kendall MG (1975) Rank correlation methods. Griffin, LondonGoogle Scholar
- Manton MJ, Della-Marta PM, Haylock MR, Hennessy KJ, Nicholls N, Chambers LE, Collins DA, Daw G, Finet A, Gunawan D, Inape K, Isobe H, Kestin TS, Lefale P, Leyu CH, Lwin T, Maitrepierre L, Ouprasitwong N, Page CM, Pahalad J, Plummer N, Salinger MJ, Suppiah R, Tran VL, Trewin B, Tibig I, Yee D (2001) Trends in extreme daily rainfall and temperature in Southeast Asia and the south pacific: 1961–1998. Int J Climatol 21:269–284CrossRefGoogle Scholar
- Williamson F, Allan R, Switzer AD, Chan JCL, Wasson RJ, D’Arrigo R, Gartner R (2015) New directions in hydro-climatic histories: observational data recovery, proxy records and the atmospheric circulation reconstructions over the earth (ACRE) initiative in Southeast Asia. Geosci Lett 2, 2Google Scholar
- Willmott CJ (1984) On the evaluation of model performance in physical geography. In: Gaile GL, Willmott CJ (eds) Spatial statistics and models. Springer, Dordrecht ISBN: 978-90-481-8385-2Google Scholar
- Yue S, Hashino M (2003) Temperature trends in Japan: 1900-1996. Theor Appl Climatol 75(1):15–27Google Scholar