Identification

Title

Historical and future vegetation changes in the degraded frozen soil and the entire Tibetan plateau and climate drivers

Abstract

About 99% of the Tibetan Plateau (TP) is covered by frozen soils and degradation of frozen soils will certainly impact TP's ecosystems. Here, we investigate decadal changes of frozen soils and net primary productivity (NPP, representing vegetation) in the degraded frozen soil zones and the TP during 1982-2014 and 2015-2100 using a dynamic vegetation model, historical records and the latest CMIP6 projections, as well as observation-based soil temperature thresholds. In 1982-2014, degraded permafrost soil zones were in the range of 316,975-455,402 km(2), with mean annual NPP staying around 84.9 gCm(-2) and annual NPP showing a significant reduction at -1.71 gCm(-2)/year due primarily to warming air. Seasonally frozen soil also degraded by 15,636 km(2) in the southeast TP, with mean annual NPP staying around 620.0 gCm(-2) and annual NPP showing a significant increase at 11.00 gCm(-2)/year. In the future, frozen soil continues to degrade and the degradation accelerates toward the end of the century such that only 2.7% of permafrost soil in 2014 is left by 2080-2100 under the shared socioeconomic pathway SSP5-8.5. Mean annual NPP in the permafrost soil degraded zones in 2015-2100 is about half of that for 1982-2014, with spatially mixed decrease and increase trends in the near-, mid-, and long-term periods. Over the seasonally frozen soil degraded zones and the entire TP, more positive than negative annual NPP changes are seen in 2015-2100, especially in the southeast of the TP, due to improved growing conditions and the expansion of primarily subtropical and temperate scrubland.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7kh0s6s

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2022-11-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact