English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Effect of nitrogen limitation and soil biophysics on Holocene greening of the Sahara

Lee, J., Claussen, M., Kim, J., Hong, J.-W., Song, I.-S., & Hong, J. (2022). Effect of nitrogen limitation and soil biophysics on Holocene greening of the Sahara. Climate of the Past, 18, 313-326. doi:10.5194/cp-18-313-2022.

Item is

Files

show Files
hide Files
:
cp-18-313-2022.pdf (Publisher version), 5MB
Name:
cp-18-313-2022.pdf
Description:
-
OA-Status:
Gold
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2022
Copyright Info:
© The Authors
:
cp-18-313-2022-supplement.pdf (Supplementary material), 747KB
Name:
cp-18-313-2022-supplement.pdf
Description:
-
OA-Status:
Gold
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
2022
Copyright Info:
© The Authors
License:
-

Locators

show

Creators

show
hide
 Creators:
Lee, J.1, Author
Claussen, Martin2, 3, Author                 
Kim, J., Author
Hong, J.-W., Author
Song, I.-S., Author
Hong, J., Author
Affiliations:
1External Organizations, ou_persistent22              
2Emeritus Scientific Members, MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_913546              
3Climate Vegetation Dynamics, MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_3356009              

Content

show
hide
Free keywords: -
 Abstract: The so-called Green Sahara (GS), which was a wet and vegetative Sahara region in the early to mid-Holocene, provides useful information on our climate simulation because it is a consequence of complex interaction between biophysical and climatic processes. It is still a challenge to simulate the GS in terms of vegetative extent and precipitation using current climate models. This study attempts to simulate the Green Sahara 8000 years ago by using the state-of-the-art Earth system model CESM that incorporates the nitrogen cycle and the soil–precipitation feedbacks. Our study puts more emphasis on the impact of soil biophysical properties (e.g., bare-soil albedo, porosity, heat capacity, and hydraulic conductivity) and soil nitrogen influenced by soil organic matter on the simulation of the GS. In this coupled simulation, vegetation interacts with changes in soil properties and soil organic matter by phenology, decomposition, and allocation of carbon and nitrogen. With changes in the Earth's orbit and dust in the early to mid-Holocene, the model simulates increased precipitation in North Africa but does not capture the extent of the GS. Our analysis shows that the Holocene greening is simulated better if the amount of soil nitrogen and soil texture is properly modified for the humid and vegetative GS period. Soil biochemical and physical properties increase precipitation and vegetation cover in North Africa through their influence on photosynthesis and surface albedo as well as their consequent enhanced albedo–precipitation and evapotranspiration–precipitation feedbacks. Our findings suggest that future climate simulation needs to consider consequent changes in soil nitrogen and texture with changes in vegetation cover and density for proper climate simulations.

Details

show
hide
Language(s): eng - English
 Dates: 2021-12-172022-02-172022-02-17
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.5194/cp-18-313-2022
BibTex Citekey: LeeClaussenEtAl2022
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Climate of the Past
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 18 Sequence Number: - Start / End Page: 313 - 326 Identifier: -