DOI: 10.1016/j.quascirev.2013.12.019
Scopus记录号: 2-s2.0-84892885925
论文题名: Evaluating CO2 and CH4 dynamics of Alaskan ecosystems during the Holocene Thermal Maximum
作者: He Y. ; Jones M.C. ; Zhuang Q. ; Bochicchio C. ; Felzer B.S. ; Mason E. ; Yu Z.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 86 起始页码: 63
结束页码: 77
语种: 英语
英文关键词: Alaska
; Biomization
; Carbon cycling
; CH4 emissions
; Ecosystem productivity
; Holocene Thermal Maximum
Scopus关键词: Alaska
; Biomization
; Carbon cycling
; Ecosystem productivity
; Holocene thermal maximums
; Atmospheric aerosols
; Biogeochemistry
; Carbon
; Carbon dioxide
; Dynamics
; Forestry
; Soil pollution
; Vegetation
; Ecosystems
; bioaccumulation
; carbon cycle
; carbon dioxide
; community dynamics
; ecosystem modeling
; emission
; evergreen forest
; global warming
; Holocene
; methane
; mixed forest
; numerical model
; paleoecology
; primary production
; reconstruction
; soil carbon
; temperature effect
; Carbon
; Carbon Dioxide
; Ecosystems
; Forestry
; Plants
; Productivity
; Alaska
; United States
英文摘要: The Arctic has experienced much greater warming than the global average in recent decades due to polar amplification. Warming has induced ecological changes that have impacted climate carbon-cycle feedbacks, making it important to understand the climate and vegetation controls on carbon (C) dynamics. Here we used the Holocene Thermal Maximum (HTM, 11-9kaBP, 1kaBP=1000calyr before present) in Alaska as a case study to examine how ecosystem Cdynamics responded to the past warming climate using an integrated approach of combining paleoecological reconstructions and ecosystem modeling. Our paleoecological synthesis showed expansion of deciduous broadleaf forest (dominated by Populus) into tundra and the establishment of boreal evergreen needleleaf and mixed forest during the second half of the HTM under a warmer- and wetter-than-before climate, coincident with the occurrence of the highest net primary productivity, cumulative net ecosystem productivity, soil C accumulation and CH4 emissions. These series of ecological and biogeochemical shifts mirrored the solar insolation and subsequent temperature and precipitation patterns during HTM, indicating the importance of climate controls on C dynamics. Our simulated regional estimate of CH4 emission rates from Alaska during the HTM ranged from 3.5 to 6.4TgCH4yr-1 and highest annual NPP of 470TgCyr-1, significantly higher than previously reported modern estimates. Our results show that the differences in static vegetation distribution maps used in simulations of different time slices have greater influence on modeled C dynamics than climatic fields within each time slice, highlighting the importance of incorporating vegetation community dynamics and their responses to climatic conditions in long-term biogeochemical modeling. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60385
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN 47907, United States; U.S. Geological Survey, National Center, Reston, VA 20192, United States; University of Alaska Fairbanks, Fairbanks, AK 99775, United States; Department of Agronomy, Purdue University, West Lafayette, IN 47907, United States; Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, PA 18015, United States
Recommended Citation:
He Y.,Jones M.C.,Zhuang Q.,et al. Evaluating CO2 and CH4 dynamics of Alaskan ecosystems during the Holocene Thermal Maximum[J]. Quaternary Science Reviews,2014-01-01,86