Land surface feedbacks and palaeomonsoons in northern Africa

Broström, A.; Coe, M.; Harrison, S. P.; Gallimore, R.; Kutzbach, J. E.; Foley, J.; Prentice, I. C.; Behling, P.

doi:10.1029/98GL02804

アイテム詳細

登録内容を編集ファイル形式で保存

一時保存へ追加

タグ情報を表示リリース履歴を表示詳細要約

公開

学術論文

Land surface feedbacks and palaeomonsoons in northern Africa

MPS-Authors

/persons/resource/persons62398

Harrison, S. P.
Research Group Paleo-Climatology, Dr. S. P. Harrison, Max Planck Institute for Biogeochemistry, Max Planck Society;

/persons/resource/persons62515

Prentice, I. C.
Department Biogeochemical Synthesis, Prof. C. Prentice, Max Planck Institute for Biogeochemistry, Max Planck Society;

External Resource

http://dx.doi.org/10.1029/98GL02804
(出版社版)

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

フルテキスト (公開)

公開されているフルテキストはありません

付随資料 (公開)

There is no public supplementary material available

引用

Broström, A., Coe, M., Harrison, S. P., Gallimore, R., Kutzbach, J. E., Foley, J., Prentice, I. C., & Behling, P. (1998). Land surface feedbacks and palaeomonsoons in northern Africa. Geophysical Research Letters, 25(19), 3615-3618. doi:10.1029/98GL02804.

引用: https://hdl.handle.net/11858/00-001M-0000-000E-CB5F-D

要旨

We ran a sequence of climate model experiments for 6000 years ago, with land-surface conditions based on a realistic map of palaeovegetation, lakes and wetlands, to quantify the effects of land-surface feedbacks in the Saharan region. Vegetation- induced albedo and moisture flux changes produced year-round warming, forced the monsoon to 17 degrees-25 degrees N two months earlier, and shifted the precipitation belt approximate to 300 km northwards compared to the effects of orbital forcing alone. The addition of lakes and wetlands produced localised changes in evaporation and precipitation, but caused no further extension of the monsoon belt. Diagnostic analyses with biome and continental hydrology models showed that the combined land- surface feedbacks, although substantial, could neither maintain grassland as far north as observed (approximate to 26 degrees N) nor maintain Lake "MegaChad" (330,000 km(2)).