NOAA/WDS Paleoclimatology - ITASE 230 Year Antarctic Ice Core Snow Accumulation Data
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Ice Core. The data include parameters of ice cores with a geographic location of Antarctica. The time period coverage is from 173 to -54 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
- Cite as: Frezzotti, M.; Urbini, S.; Proposito, M.; Scarchilli, C.; Gandolfi, S. (2017-09-22): NOAA/WDS Paleoclimatology - ITASE 230 Year Antarctic Ice Core Snow Accumulation Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/ac8f-t589. Accessed [date].
- Please refer to Credit tab for full citation information.
- doi:10.25921/ac8f-t589
- noaa-icecore-22710
- NCEI DSI 1200_02
- NCEI DSI 1200_01
noaa-icecore-22710
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Distributor | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | NOAA National Centers for Environmental Information
ncei.info@noaa.gov |
Dataset Point of Contact | Data Center Contact
NOAA World Data Service for Paleoclimatology 828-271-4800 paleo@noaa.gov |
Coverage Description | Date Range: 1777 CE to 2004 CE; Date Range: 173 cal yr BP to -54 cal yr BP; |
Time Period | 1777 to 2004 |
Spatial Bounding Box Coordinates |
N: -70.68
S: -74.03
E: 158.86
W: 158.54
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Data update frequency not available |
Supplemental Information |
STUDY NOTES: Snow accumulation data from 3 ITASE ice cores along a north-south transect collected in the Talos Dome area of East Antarctica.
ABSTRACT SUPPLIED BY ORIGINATOR: Predictions concerning Antarctica's contribution to sea level change have been hampered by poor knowledge of surface mass balance. Snow accumulation is the most direct climate indicator and has important implications for paleoclimatic reconstruction from ice cores. Snow accumulation measurements (stake, core, snow radar) taken along a 500-km transect crossing Talos Dome (East Antarctica) have been used to assess accumulation signals and the representativeness of ice core records. Stake readings show that accumulation hiatuses can occur at sites with accumulation rates below 120 kg m-2 yr-1. Differences between cores and stakes can lead to statistical misidentification of annual layers determined from seasonal signals at sites with accumulation rates below 200 kg m-2 yr-1 because of nondetection of higher and lower values. Achieving ±10% accuracy in the reconstruction of snow accumulation from single cores requires high accumulation (750 kg m-2 yr-1). Low-accumulation sites are representative if cumulative rates computed over several years are used to reach the 750 kg m-2 yr-1 threshold. Temporal variability of accumulation over the last two centuries shows no significant increase in accumulation. Wind-driven processes are a fundamental component of surface mass balance. Spatial variations in accumulation are well correlated with surface slope changes along the wind direction and may exceed 200 kg m-2 yr-1 within 1 km. Wind-driven sublimation rates are less than 50 kg m-2 yr-1 in plateau areas and up to 260 kg m-2 yr-1 in slope areas and account for 20-75% of precipitation, whereas depositional features are negligible in surface mass balance. |
Purpose | Records of past temperature, precipitation, atmospheric trace gases, and other aspects of climate and environment derived from ice cores drilled on glaciers and ice caps around the world. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. |
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Theme keywords | Global Change Master Directory (GCMD) Science Keywords
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Last Modified: 2023-09-01
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