TY  - JOUR
A1  - Stärz, Michael
A1  - Lohmann, Gerrit
A1  - Knorr, Gregor
T1  - Dynamic soil feedbacks on the climate of the mid-Holocene and the last glacial maximum
T2  - Climate of the past discussions
N2  - State-of-the-art general circulation models (GCMs) are tested and challenged by the ability to reproduce paleoclimate key intervals. In order to account for climate changes associated with soil dynamics we have developed a soil scheme, which is asynchronously coupled to a state-of-the-art atmosphere ocean GCM with dynamic vegetation. We test the scheme for conditions representative of a warmer (mid-Holocene, 6 kyr before present, BP) and colder (Last Glacial Maximum, 21 kyr BP) than pre-industrial climate. The computed change of physical soil properties (i.e. albedo, water storage capacity, and soil texture) for these different climates leads to amplified global climate anomalies. Especially regions like the transition zone of desert/savannah and taiga/tundra, exhibit an increased response as a result of the modified soil treatment. In comparison to earlier studies, the inclusion of the soil feedback pushes our model simulations towards the warmer end in the range of mid-Holocene studies and beyond current estimates of global cooling during the Last Glacial Maximum based on PMIP2 (Paleoclimate Modelling Intercomparison Project 2) studies. The main impact of the interactive soil scheme on the climate response is governed by positive feedbacks, including dynamics of vegetation, snow, sea ice, local water recycling, which might amplify forcing factors ranging from orbital to tectonic timescales.
Y1  - 2013
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/32983
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-329832
SN  - 1814-9359
N1  - © Author(s) 2013. This work is distributed under the Creative Commons Attribution 3.0 License.
VL  - 9
SP  - 2717
EP  - 2770
PB  - European Geosciences Union
CY  - Katlenburg-Lindau
ER  -