noaa-model-10477
Ensemble Simulation of the Last Millennium using the Comprehensive COSMOS Earth System Model
Jungclaus, J.H.
Ensemble Simulation of the Last Millennium using the Comprehensive COSMOS Earth System Model
2011-03-14
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/10477
Investigator
J.H.
Jungclaus
earth science
paleoclimate
paleoclimatic modeling
latitude,null,null,degree north,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
surface air temperature,null,null,kelvin,null,paleoclimatic modeling,null,null,N,2 meter air temperature
earth science
paleoclimate
paleoclimatic modeling
precipitation,null,null,kilogram per square meter per second,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
age,null,null,year Common Era,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
surface temperature,null,null,kelvin,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
sea level pressure,null,null,pascal,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
longitude,null,null,degree east,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
model
atmosphere model
earth science
paleoclimate
model
ocean model
geoscientificInformation
sensitivity
800 AD
2100 AD
1150 cal yr BP
-150 cal yr BP
Complete
-90
90
-180
180
Geographic Region
Global
Global>LATITUDE >LONGITUDE
None
Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Jungclaus, J.H., S.J. Lorenz, C. Timmreck, C.H. Reick, V. Brovkin, K. Six, J. Segschneider, M.A. Giorgetta, T.J. Crowley, J. Pongratz, N.A. Krivova, L.E. Vieira, S.K. Solanki, D. Klocke, M. Botzet, M. Esch, V. Gayler, H. Haak, T.J. Raddatz, E. Roeckner, R. Schnur, H. Widmann, M. Claussen, B. Stevens and J. Marotzke. 2010. Climate and carbon-cycle variability over the last millennium. Clim. Past, 6, 723-737, doi:10.5194/cp-6-723-2010
A long-standing task in climate research has been to distinguish between anthropogenic climate change and natural climate variability. A prerequisite for fulfilling this task is the understanding of the relative roles of external drivers and internal variability of climate and the carbon cycle. Here, we present the first ensemble simulations over the last 1200 years with a comprehensive Earth system model including a fully interactive carbon cycle. Applying up-to-date reconstructions of external forcing including the recent low-amplitude estimates of solar variations, the ensemble simulations reproduce temperature evolutions consistent with the range of reconstructions. The 20th-century warming trend stands out against all pre-industrial trends within the ensemble. Volcanic eruptions are necessary to explain variations in pre-industrial climate such as the Little Ice Age; yet only the strongest, repeated eruptions lead to cooling trends that differ significantly from the internal variability across all ensemble members. The simulated atmospheric CO2 concentrations exhibit a stable carbon cycle over the pre-industrial era with multi-centennial variations somewhat smaller than in the observational records. Early land-cover changes have modulated atmospheric CO2 concentrations only slightly. We provide a model-based quantification of the sensitivity (termed γ) of the global carbon cycle to temperature for a variety of climate and forcing conditions. We diagnose a distinct dependence of γ on the forcing strength and time-scales involved, thus providing a possible explanation for the systematic difference in the observational estimates for different segments of the last millennium.
STUDY NOTES: The data is all monthly means on a 96 x 48 gaussian grid.
Experiment ID Length Description
mil0001_EH5_mm 800-3800 yr. 800 control experiment
mil0002_EH5_mm 800-2100 land use change only (best guess)
mil0005_EH5_mm 800-2005 solar forcing only
mil0006_EH5_mm 800-2005 solar forcing only (scaled to 0.25% amp.)
mil0007_EH5_mm 800-2100 as mil0002, only biogeochemical influence of land cover changes
mil0008_EH5_mm 1860-2100 as mil002, plus fossil fuel emissions
mil0009_EH5_mm 800-2005 Volcanoes only
mil0010_EH5_mm 800-2005 full forcing (ensemble member 1)
mil0012_EH5_mm 800-2005 full forcing (ensemble member 2)
mil0013_EH5_mm 800-2005 full forcing (ensemble member 3)
mil0014_EH5_mm 800-2005 full forcing (ensemble member 4)
mil0015_EH5_mm 800-2005 full forcing (ensemble member 5)
mil0021_EH5_mm 800-2100 full forcing using solar forcing of Bard (ensemble member 1)
mil0025_EH5_mm 800-2100 full forcing using solar forcing of Bard (ensemble member 2)
mil0026_EH5_mm 800-2100 full forcing using solar forcing of Bard (ensemble member 3)
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/mpi/
Data Folder; MILL-COSMOS Files
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/mpi/MILL-COSMOS-readme.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11