Keyword

hydrology

3 record(s)

 

Provided by

Type of resources

Topics

Keywords

Contact for the resource

Update frequencies

From 1 - 3 / 3

  • The PolarLakes dataset provides bi-weekly observations of supraglacial lakes on Antarctic ice shelves, utilizing imagery from Sentinel-2 and Sentinel-1 to address time series gaps caused by frequent cloud cover. These observations detect the extents of supraglacial lakes with a U-Net model for every two weeks from November to March, with each sensor operating independently before the data is merged. The resulting bi-weekly product reflects the maximum lake extents for the first and second halves of each month. When combined for an entire season, the dataset consolidates all bi-weekly records over these five months, allowing for analysis of the maximum lake extent per season and the frequency of lake formation, which can occur up to ten times (5 months á two weeks). The year indicated in the dataset corresponds to January of the melt season, as this month typically experiences the highest melt rates (e.g., 2023 refers to the season from November 2022 to March 2023). The aggregation of all annual datasets creates a recurrence layer that illustrates the frequency of lake presence throughout the entire observation period, which spans from 2014 to 2024, depending on satellite data availability for each ice shelf. The PolarLakes dataset provides valuable insights into the dynamics of supraglacial lakes and serves as a crucial resource for hydrological and climate modeling.

  • The SRLV40 TTAAii Data Designators decode as: T1 (S): Surface data T1T2 (SR): Hydrological (river) reports A1A2 (LV): Latvia (Remarks from Volume-C: NilReason)

  • Meteorologische Mess- und Beobachtungsdaten und daraus abgeleitete Datensätze für die Vergangenheit (vom Vortag oder älter) und für die Zukunft (Klimaprojektionen bis 2100). Die Klimadatensätze sind stationsbezogene, gebietsbezogene Daten oder Rasterdatenfelder für Deutschland. Klimadatensätze, die über Deutschland hinausgehen, werden hier ebenfalls bereitgestellt, wenn ihre entgeltfreie Bereitstellung geregelt ist (z.B. im Rahmen der WMO oder in Projektvereinbarungen der international beteiligten Partner). Die Datensätze stehen entgeltfrei unter https://opendata.dwd.de/climate zur Verfügung. Weitere Infos finden Sie auch auf dem Leistungssteckbrief unserer Internetseite https://www.dwd.de/DE/leistungen/opendata/opendata.html.