Influence of climate on multiple tree-ring parameters of Pinus kesiya from Manipur,Northeast India |
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| Institution: | 1. Birbal Sahni Institute of Palaeosciences, 53-University Road, Lucknow 226 007, India;2. Department of Geography, Gauhati University, Guwahati 781 014, India;1. Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow, 226007, India;2. Centre of Advanced Study in Geology, Kumaun University, Nainital, 263002, India;3. Indian Institute of Technology Gandhinagar, Ahmedabad, 382424, India;1. State Key Laboratory of Tree Genetics and Breeding, School of Forestry, Northeast Forestry University, Harbin 150040, PR China;2. Center for Ecological Research, Northeast Forestry University, Harbin 150040, PR China;3. Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, Box 49, SE-230 52 Alnarp, Sweden;1. Missouri Tree-Ring Laboratory, School of Natural Resources, University of Missouri, 1111 Rollins Street, Columbia, MO, 65211, USA;2. The Jones Center at Ichauway, 3988 Jones Center Drive, Newton, GA, 39870, USA;1. Khakass Technical Institute, Siberian Federal University, 27 Shchetinkina st., 655017 Abakan, Russia;2. Birbal Sahni Institute of Palaeosciences, 53 University Road, 226007 Lucknow, India;3. Siberian Federal University, 79 Svobodny pr., 660041 Krasnoyarsk, Russia;4. Sukachev Institute of Forest, Siberian Branch of the Russian Academy of Science, 50 bil. 28, Akademgorodok, 660036 Krasnoyarsk, Russia;1. Ministry of Education Key Laboratory of Water and Sediment Science, School of Environment, Beijing Normal University, Beijing 100875, China;2. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;3. School of Water Resources and Hydropower Engineering, North China Electric Power University, Beijing 102206, China |
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| Abstract: | Tree-rings of Pinus kesiya from southern region of Manipur, Northeast India were used to develop chronologies of multiple tree-ring parameters that are: total-ring width (TRW), earlywood width (EW), latewood width (LW) and adjusted latewood (LWadj). The time span of these chronologies is 39 years (1980–2018 C.E.) and we compared their growth responses with monthly and daily climatic records. The comparison revealed a broadly consistent pattern of climate sensitivity with daily climate exhibiting higher correlation. The climate signals during pre-monsoon (March–May) were recorded in TRW and EW, whereas late-monsoon to post-monsoon climate signals were recorded in LW and LWadj. The spatial correlation analysis of tree-ring parameters and global sea surface temperature (SST) showed a positive relationship between tree growth with tropical Pacific Ocean and Indian Ocean during winter (December–February) and pre-monsoon (March–May) seasons. The LW and LWadj were also correlated with peak summer monsoon (July–August) SST over the tropical Pacific Ocean. IADFs observed in EW (E-IADF) were caused by dry and warm conditions during March–April. IADFs in LW (L-IADF) occurred due to a combination of enhanced rainfall and temperature during post-monsoon (October–November) season. Evidence of stand-specific micro-climatic conditions in the formation IADFs in this species was also found. This study showed that multiple parameters of P. kesiya provides a lucid understanding of climate response on its growth and can be considered as a proxy for studying sub-seasonal changes in past environmental conditions in longer records. |
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| Keywords: | Tree growth Daily climate Earlywood Latewood Intra-annual density fluctuations |
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