气候变化领域集成服务门户(CCPortal): New high-resolution estimates of the permafrost thermal state and hydrothermal conditions over the Northern Hemisphere

CCPortal

DOI	10.5194/essd-14-865-2022
	New high-resolution estimates of the permafrost thermal state and hydrothermal conditions over the Northern Hemisphere
	Ran, Youhua; Li, Xin; Cheng, Guodong; Che, Jingxin; Aalto, Juha; Karjalainen, Olli; Hjort, Jan; Luoto, Miska; Jin, Huijun; Obu, Jaroslav; Hori, Masahiro; Yu, Qihao; Chang, Xiaoli
通讯作者	Ran, YH (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Heihe Remote Sensing Expt Res Stn, Lanzhou 730000, Peoples R China. ; Ran, YH (通讯作者)，Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China.
发表日期	2022
ISSN	1866-3508
EISSN	1866-3516
起始页码	865
结束页码	884
卷号	14 期号:2
英文摘要	Monitoring the thermal state of permafrost (TSP) is important in many environmental science and engineering applications. However, such data are generally unavailable, mainly due to the lack of ground observations and the uncertainty of traditional physical models. This study produces novel permafrost datasets for the Northern Hemisphere (NH), including predictions of the mean annual ground temperature (MAGT) at the depth of zero annual amplitude (DZAA) (approximately 3 to 25 m) and active layer thickness (ALT) with 1 km resolution for the period of 2000-2016, as well as estimates of the probability of permafrost occurrence and permafrost zonation based on hydrothermal conditions. These datasets integrate unprecedentedly large amounts of field data (1002 boreholes for MAGT and 452 sites for ALT) and multisource geospatial data, especially remote sensing data, using statistical learning modeling with an ensemble strategy. Thus, the resulting data are more accurate than those of previous circumpolar maps (bias = 0 :02 +/- 0 :16 degrees C and RMSE = 1 :32 +/- 0 :13 degrees C for MAGT; bias = 2 :71 +/- 16 :46 cm and RMSE = 86 :93 +/- 19 :61 cm for ALT). The datasets suggest that the areal extent of permafrost (MAGT <= 0 degrees C) in the NH, excluding glaciers and lakes, is approximately 14.77 (13.60-18.97) x 10(6) km(2) and that the areal extent of permafrost regions (permafrost probability > 0) is approximately 19 :82 x 10(6) km(2). The areal fractions of humid, semiarid/subhumid, and arid permafrost regions are 51.56 %, 45.07 %, and 3.37 %, respectively. The areal fractions of cold (<= 3 :0 degrees C), cool (-3 :0 degrees C to -1 :5 degrees C), and warm ( > 1 :5 degrees C) permafrost regions are 37.80 %, 14.30 %, and 47.90 %, respectively. These new datasets based on the most comprehensive field data to date contribute to an updated understanding of the thermal state and zonation of permafrost in the NH. The datasets are potentially useful for various fields, such as climatology, hydrology, ecology, agriculture, public health, and engineering planning. All of the datasets are published through the National Tibetan Plateau Data Center (TPDC), and the link is https://doi.org/10.11888/Geocry.tpdc.271190 (Ran et al., 2021a).
关键词	QINGHAI-TIBET PLATEAU ACTIVE-LAYER THICKNESS TEMPERATURE MOUNTAINS PRODUCT CLIMATE DEGRADATION DYNAMICS DATABASE NETWORK
语种	英语
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000763266100001
来源期刊	EARTH SYSTEM SCIENCE DATA
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/255104
作者单位	[Ran, Youhua; Cheng, Guodong; Jin, Huijun; Yu, Qihao] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Heihe Remote Sensing Expt Res Stn, Lanzhou 730000, Peoples R China; [Li, Xin] Chinese Acad Sci, Natl Tibetan Plateau Data Ctr, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst Environm, Beijing 100101, Peoples R China; [Ran, Youhua; Yu, Qihao] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; [Cheng, Guodong] Shanghai Normal Univ, Inst Urban Study, Shanghai 200234, Peoples R China; [Che, Jingxin] Nanchang Inst Technol, Sch Sci, Nanchang 330099, Jiangxi, Peoples R China; [Aalto, Juha; Luoto, Miska] Univ Helsinki, Dept Geosci & Geog, POB 64,Gustaf Hallstromin Katu 2a, Helsinki 00014, Finland; [Aalto, Juha] Finnish Meteorol Inst, POB 503, Helsinki 00101, Finland; [Karjalainen, Olli; Hjort, Jan] Univ Oulu, Geog Res Unit, POB 8000, Oulu 90014, Finland; [Jin, Huijun] Northeast Forestry Univ, Inst Cold Reg Sci & Engn, Harbin 150040, Peoples R China; [J...
推荐引用方式 GB/T 7714	Ran, Youhua,Li, Xin,Cheng, Guodong,et al. New high-resolution estimates of the permafrost thermal state and hydrothermal conditions over the Northern Hemisphere[J]. 中国科学院西北生态环境资源研究院,2022,14(2).
APA	Ran, Youhua.,Li, Xin.,Cheng, Guodong.,Che, Jingxin.,Aalto, Juha.,...&Chang, Xiaoli.(2022).New high-resolution estimates of the permafrost thermal state and hydrothermal conditions over the Northern Hemisphere.EARTH SYSTEM SCIENCE DATA,14(2).
MLA	Ran, Youhua,et al."New high-resolution estimates of the permafrost thermal state and hydrothermal conditions over the Northern Hemisphere".EARTH SYSTEM SCIENCE DATA 14.2(2022).