English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Synergistic feedbacks between ocean and vegetation on mid- and high-latitude climates during the mid-Holocene

Wohlfahrt, J., Harrison, S. P., & Braconnot, P. (2004). Synergistic feedbacks between ocean and vegetation on mid- and high-latitude climates during the mid-Holocene. Climate Dynamics, 22(2-3), 223-238.

Item is

Files

show Files
hide Files
:
BGC0701.pdf (Publisher version), 869KB
 
File Permalink:
-
Name:
BGC0701.pdf
Description:
-
OA-Status:
Visibility:
Restricted (Max Planck Institute for Biogeochemistry, MJBK; )
MIME-Type / Checksum:
application/octet-stream
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Wohlfahrt, J.1, Author           
Harrison, S. P.1, Author           
Braconnot, P., Author
Affiliations:
1Research Group Paleo-Climatology, Dr. S. P. Harrison, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497765              

Content

show
hide
Free keywords: Last glacial maximum Northern high-latitudes 6000 years bp Sea-ice Kyr bp Atmospheric circulation Coupled model Biome model Large-scale Sensitivity
 Abstract: Simulations with the IPSL atmosphere-ocean model asynchronously coupled with the BIOME1 vegetation model show the impact of ocean and vegetation feedbacks, and their synergy, on mid- and high-latitude (>40degreesN) climate in response to orbitally-induced changes in mid-Holocene insolation. The atmospheric response to orbital forcing produces a +1.2 degreesC warming over the continents in summer and a cooling during the rest of the year. Ocean feedback reinforces the cooling in spring but counteracts the autumn and winter cooling. Vegetation feedback produces warming in all seasons, with largest changes (+1 degreesC) in spring. Synergy between ocean and vegetation feedbacks leads to further warming, which can be as large as the independent impact of these feedbacks. The combination of these effects causes the high northern latitudes to be warmer throughout the year in the ocean-atmosphere-vegetation simulation. Simulated vegetation changes resulting from this year-round warming are consistent with observed mid-Holocene vegetation patterns. Feedbacks also impact on precipitation. The atmospheric response to orbital-forcing reduces precipitation throughout the year; the most marked changes occur in the mid-latitudes in summer. Ocean feedback reduces aridity during autumn, winter and spring, but does not affect summer precipitation. Vegetation feedback increases spring precipitation but amplifies summer drying. Synergy between the feedbacks increases precipitation in autumn, winter and spring, and reduces precipitation in summer. The combined changes amplify the seasonal contrast in precipitation in the ocean-atmosphere-vegetation simulation. Enhanced summer drought produces an unrealistically large expansion of temperate grasslands, particularly in mid-latitude Eurasia. [References: 71]

Details

show
hide
Language(s):
 Dates: 2004
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: Other: BGC0701
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Climate Dynamics
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Heidelberg : Springer-International
Pages: - Volume / Issue: 22 (2-3) Sequence Number: - Start / End Page: 223 - 238 Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/954925568800
ISSN: 0930-7575