Horizontal profiles of longwave and shortwave radiation components over sea ice near Barrow, Alaska during the 2011 melt ...

• Main Authors: Hudson, Stephen R, Granskog, Mats A, Karlsen, Tor Ivan, Fossan, Kristen
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2012
• Subjects: Ice survey; Barrow; Sea ice; Alaska
• Online Access: https://dx.doi.org/10.1594/pangaea.780085; https://doi.pangaea.de/10.1594/PANGAEA.780085

An integrated instrument package for measuring and understanding the surface radiation budget of sea ice is presented, along with results from its first deployment. The setup simultaneously measures broadband fluxes of upwelling and downwelling terrestrial and solar radiation (four components separately), spectral fluxes of incident and reflected solar radiation, and supporting data such as air temperature and humidity, surface temperature, and location (GPS), in addition to photographing the sky and observed surface during each measurement. The instruments are mounted on a small sled, allowing measurements of the radiation budget to be made at many locations in the study area to see the effect of small-scale surface processes on the large-scale radiation budget. Such observations have many applications, from calibration and validation of remote sensing products to improving our understanding of surface processes that affect atmosphere-snow-ice interactions and drive feedbacks, ultimately leading to the ... : Daily measurements of incoming and outgoing broadband fluxes of longwave and shortwave radiation, incoming and outgoing spectral fluxes of shortwave radiation, and air temperature and humidity, along with sky and surface photographs, all measured simultaneously every 5 m along a 200-m transect on landfast sea ice near Barrow, Alaska from 5 to 13 June 2011. The transect included a mix of bare ice (scattering layer), shallow melt ponds, and deep melt ponds. During the measurement period some refreezing took place, along with some light snowfall on the later days. Measurements were made around local noon each day (local noon in Barrow in summer is around 14:30 Alaska Summer Time (UTC-8). Times in the data files are given in UTC, but files are named with the local date, even if the observations occasionally occurred early on the following day UTC. In addition to latitude and longitude, distance along the profile is given in meters from an average starting point at 71.366563°N, 156.544292°W.There are nine ...