1 / 9

Thermal Infrared Remote Sensing of Lake Temperatures – Status Quo and the Future

Thermal Infrared Remote Sensing of Lake Temperatures – Status Quo and the Future. Philipp Schneider Jet Propulsion Laboratory California Institute of Technology Contact: philipp.schneider@jpl.nasa.gov. Main research areas. Spatially distributed temperature mapping Coastal upwelling events

kawena
Download Presentation

Thermal Infrared Remote Sensing of Lake Temperatures – Status Quo and the Future

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Thermal Infrared Remote Sensing of Lake Temperatures – Status Quo and the Future Philipp Schneider Jet Propulsion Laboratory California Institute of Technology Contact: philipp.schneider@jpl.nasa.gov

  2. Main research areas • Spatially distributed temperature mapping • Coastal upwelling events • Temperature fronts • Circulation patterns • Quantifying long-term temporal trends in lake temperature • How do lake temperatures react to climate change? • Can lake temperatures be used as independent observations and indicators of climate change? • How reliable are satellite-derived trends? • What do such changes mean for lake ecology? 1985-2008 JAS temperature time series for the Great Lakes derived from merged AVHRR Pathfinder and (A)ATSR data

  3. Status Quo: TIR Data availability • Moderate Resolution Imaging Spectroradiometer (MODIS) • Terra (2000 through present) • Aqua (2002 through present) • Advanced Very High Resolution Radiometer (AVHRR) • 1981/1985 through present • Series of Along-Track Scanning Radiometers (ATSR) • ATSR (1991 through 1997) • ATSR-2 (1996 through 2003) • AATSR (2002 through present Spatial resolution: Good Temporal resolution: Good Record length: Poor Accuracy: Good Spatial resolution: Good/Poor Temporal resolution: Good Record length: Good Accuracy: Poor Spatial resolution: Good Temporal resolution: Moderate Record length: Moderate Accuracy: Good

  4. Status Quo: TIR Data quality RMSE = 0.2 ºC Validation of MODIS Terra, AATSR, and ATSR-2 lake surface temperatures against radiometer-based in situ observations at Lake Tahoe Validation of 1985-2008 satellite trends against trends computed from hourly data of eight NDBC buoys at the Great Lakes

  5. What is needed in future? • Advancing space-based mapping of lake temperatures • High spatial resolution (< 100 m) • Data accuracy (< 0.2 K?) • Good in situ data for validation (radiometer-based skin temperature measurements) • How can we improve the analysis of long-term trends in lake temperatures? • Moderate spatial resolution (~ 500 m) • High temporal resolution • Data continuity • Consistent calibration and validation • Reprocessing of the existing archive to achieve better inter-sensor consistency HyspIRI HyspIRI+ VIIRS + ?

  6. Multi-sensor TIR time series Multi-sensor time series of Lake Tahoe surface temperature 1985-2009

  7. Global trends

  8. Global average Global mean JAS temperature anomaly over 129 lakes worldwide with respect to the 1985-2008 mean Trend:0.35 ºC / decade

  9. Potential discussion topics • How can both data continuity AND data accuracy ensured in the future? • What resolutions (spatial, temporal, spectral) are required? • What other temperature-related research is the Great Lakes community interested in and how can we address them? • How do temperature trends at the Great Lakes relate to lake temperature trends in other regions

More Related