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Changes in the Geometry and Volume of Rabots glaciär,Sweden, 2003–2011: Recent Accelerated Volume Loss Linked to More Negative Summer Balances 下载免费PDF全文
Keith A. Brugger Latysha Pankratz 《Geografiska Annaler: Series A, Physical Geography》2015,97(2):265-278
Terminus geometry, ice margins, and surface elevations on Rabots glaciär were measured using differential GPS during summer 2011 and compared with those similarly measured in 2003. Glacier length over the eight years decreased by ~105 m corresponding to 13 m a?1, a rate consistent with ice recession over the last several decades. Measured changes in surface elevations show that between 2003 and 2011 the glacier's volume decreased by ~27.6 ± 2.6 × 106 m3, or 3.5 ± 0.3 × 106 m3 a?1. This compares favorably with an estimate of ?28.1 ± 2.6 × 106 m3 based on a mass‐balance approach. The rate of volume loss appears, however, to have significantly increased after 2003, being substantially greater than rates determined for the intervals 1959–80, 1980–89, and 1989–2003. This increase corresponds to a sustained interval of more negative summer balances. Previous work suggests that as of 2003 Rabots glaciär had not yet completed its response to a ~1°C warming that occurred c. 1900, and thus the current marked increase rate of ice loss might reflect the effect of recent, or accelerated regional warming that occurred during the last decade superimposed on its continued response to that earlier warming. 相似文献
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Christopher K. Pankratz Barry G. Knapp Randy A. Reukauf Juan Fontenla Michael A. Dorey Lillian M. Connelly Ann K. Windnagel 《Solar physics》2005,230(1-2):389-413
The SORCE Science Data System produces total solar irradiance (TSI) and spectral solar irradiance (SSI) data products on a
daily basis, which are formulated using measurements from the four primary instruments onboard the SORCE spacecraft. The Science
Data System utilizes raw spacecraft and instrument telemetry, calibration data, and other ancillary information to produce
and distribute a variety of data products that have been corrected for all known instrumental and operational effects. SORCE
benefits from a highly optimized object-oriented data processing system in which all data are stored in a commercial relational
database system, and the software itself determines the versions of data products at run-time. This unique capability facilitates
optimized data storage and CPU utilization during reprocessing activities by requiring only new data versions to be generated
and stored. This paper provides an overview of the SORCE data processing system, details its design, implementation, and operation,
and provides details on how to access SORCE science data products. 相似文献
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