气候变化领域集成服务门户(CCPortal): Permafrost zonation index map and statistics over the Qinghai-Tibet Plateau based on field evidence

CCPortal

DOI	10.1002/ppp.2006
	Permafrost zonation index map and statistics over the Qinghai-Tibet Plateau based on field evidence
	Cao, Bin; Zhang, Tingjun; Wu, Qingbai; Sheng, Yu; Zhao, Lin; Zou, Defu
发表日期	2019
ISSN	1045-6740
EISSN	1099-1530
起始页码	178
结束页码	194
卷号	30 期号:3
英文摘要	Permafrost is prevalent over the Qinghai-Tibet Plateau (QTP), but mapping its distribution is challenging due to the limited availability of ground-truth data sets and strong spatial heterogeneity in the region. Based on a recently developed inventory of permafrost presence or absence from 1475 in situ observations, we developed and trained a statistical model and used it to compile a high-resolution (30 arc-seconds) permafrost zonation index (PZI) map. The PZI model captures the high spatial variability of permafrost distribution over the QTP because it considers multiple controlling variables, including near-surface air temperature downscaled from re-analysis, snow cover days and vegetation cover derived from remote sensing. Our results showed the new PZI map achieved the best performance compared to available existing PZI and traditional categorical maps. Based on more than 1000 in situ measurements, the Cohen's kappa coefficient and overall classification accuracy were 0.62 and 82.5%, respectively. Excluding glaciers and lakes, the area of permafrost regions over the QTP is approximately 1.54 (1.35-1.66) x10(6) km(2), or 60.7 (54.5-65.2)% of the exposed land, while area underlain by permafrost is about 1.17 (0.95-1.35) x10(6) km(2), or 46 (37.3-53.0)%.
英文关键词	mountians; permafrost distribution; permafrost zonation index; Qinghai-Tibet Plateau
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geology
WOS关键词	ACTIVE LAYER ; ERA-INTERIM ; TEMPERATURE DATA ; EUROPEAN ALPS ; SNOW COVER ; CLIMATE ; SOIL ; ASSIMILATION ; VARIABILITY ; MOUNTAINS
WOS记录号	WOS:000482392000005
来源期刊	PERMAFROST AND PERIGLACIAL PROCESSES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/240296
作者单位	[Cao, Bin; Zhang, Tingjun] Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China; [Cao, Bin] Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing, Peoples R China; [Wu, Qingbai; Sheng, Yu] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou, Gansu, Peoples R China; [Zhao, Lin] Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing, Jiangsu, Peoples R China; [Zou, Defu] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Cryosphere Res Stn Qinghai Tibet Plateau, Lanzhou, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Cao, Bin,Zhang, Tingjun,Wu, Qingbai,et al. Permafrost zonation index map and statistics over the Qinghai-Tibet Plateau based on field evidence[J]. 中国科学院西北生态环境资源研究院,2019,30(3).
APA	Cao, Bin,Zhang, Tingjun,Wu, Qingbai,Sheng, Yu,Zhao, Lin,&Zou, Defu.(2019).Permafrost zonation index map and statistics over the Qinghai-Tibet Plateau based on field evidence.PERMAFROST AND PERIGLACIAL PROCESSES,30(3).
MLA	Cao, Bin,et al."Permafrost zonation index map and statistics over the Qinghai-Tibet Plateau based on field evidence".PERMAFROST AND PERIGLACIAL PROCESSES 30.3(2019).