noaa-recon-11928
Sahara-Sahel Holocene Paleohydrological Database
Lézine, A.-M.; Hély, C.; Grenier, C.; Braconnot, P.; Krinner, G.
Sahara-Sahel Holocene Paleohydrological Database
2011-08-23
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/11928
Investigator
A.-M.
Lézine
Investigator
C.
Hély
Investigator
C.
Grenier
Investigator
P.
Braconnot
Investigator
G.
Krinner
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
notes,null,null,null,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,C,DateMethod
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
latitude,null,null,degree north,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,N,null
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
notes,null,null,null,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,C,County
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
age,null,one standard deviation,radiocarbon year before present,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,N,null
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
age,null,unspecified error upper bound,calendar kiloyear before present,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,N,null
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
age,null,null,radiocarbon year before present,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,N,null
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
notes,null,null,null,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,C,CountryCode
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
notes,null,null,null,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,C,Sample
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
sample identification,null,null,null,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,C,Lab#
earth science
paleoclimate
lake levels|paleolimnology
lake level,null,null,dimensionless,null,lake levels|paleolimnology,raw,null,C,null
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
sample identification,null,null,null,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,C,SiteName
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
longitude,null,null,degree east,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,N,null
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
age,null,unspecified error lower bound,calendar kiloyear before present,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,N,null
earth science
paleoclimate
climate reconstructions|lake levels|other collections|paleolimnology
notes,null,null,null,null,climate reconstructions|lake levels|other collections|paleolimnology,null,null,C,Country
earth science
paleoclimate
reconstructions
lake level
geoscientificInformation
Other Hydroclimate Reconstruction
hydrology
10200 cal yr BP
1500 cal yr BP
Complete
20.3
20.3
9.03
9.03
Continent
Africa
Western Africa
Niger
Adrar Bous>LATITUDE 20.3>LONGITUDE 9.03
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
Lézine, A.-M., C. Hély, C. Grenier, P. Braconnot,
and G. Krinner. 2011.
Sahara and Sahel vulnerability to climate changes,
lessons from Holocene hydrological data.
Quaternary Science Reviews. doi:10.1016/j.quascirev.2011.07.006
The examination of more than 1500 paleohydrological dated records
collected between 10 and 28°N during the last 50 years have been
used to improve our knowledge and understanding of the Sahara
and Sahel vulnerability to the Atlantic monsoon changes in the
long-term. We have analyzed the distribution of water bodies
(mainly lakes and wetlands) over time and space: the central
Saharan massifs played a major role in favoring water supply
to the lowlands throughout the whole African Humid Period.
In addition, distinct East-West dynamics is recorded with
humidity starting - and stopping - several millennia earlier
to the east than to the west of the Sahara.
A series of time lags are discussed: (1) between the maximum
of deep (fresh water) lake formation during the early Holocene
and the maximum of water body extensions during the mid-Holocene
which highlight the primary role of aquifer water level in lake
response to climate change (2) between the hydrological history
of the Sahara and the Sahel and the forcings - mainly insolation
changes - during the early and mid-Holocene which involves complex
interactions between remnant ice sheet in the Northern Hemisphere,
open water bodies in the Sahara and Sahel and the Atlantic monsoon
system.
STUDY NOTES: Database of Holocene paleohydrological reconstructions derived
from published sources for the Sahara and Sahel, 10°N to 28°N.
The former extent of lakes, wetlands and rivers can be
reconstructed by a variety of paleolimnological evidence
including abandoned shorelines, sediment outcrops, aquatic
pollen types from sediment cores, remains of aquatic faunas
such as hippos, fishes and shells, and former fluvial terraces.
Paleohydrological variations can also be inferred from
paleosalinity reconstructions from micro-faunal assemblages
(diatoms, chironomids, ostracods) and stable isotope ratios
in carbonates. This data set is composed of 1688 dated samples
from about 415 localities in the present day Sahara and Sahel,
extracted from original published studies.
The file has been slightly modified from the original version
used for the paper: new references have been included,
and unpublished data have been removed.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/africa/sahara-sahel2011hydro.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/africa/sahara-sahel2011hydro.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11