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In situ sounding of radiative flux profiles through the Arctic lower troposphere
- Source :
- EPIC3Bulletin of Atmospheric Science and Technology, Springer, ISSN: 2662-1495
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- In situ profiles and fixed-altitude time series of all four components of net radiation were obtained at Ny-Ålesund, Svalbard (78.9° N, 11.9° E), in the period May 04–21, 2015. Measurements were performed using adapted high-quality instrumentation classified as “secondary standard” carried by a tethered balloon system. Balloon-lifted measurements of albedo under clear-sky conditions demonstrate the local dependence on altitude and on the surface inhomogeneity of this parameter over coastal terrain of Ny-Ålesund. Depending on the surface composition within the sensor’s footprint near the coastline, the albedo over predominantly snow-covered surfaces was found to decrease to 0.548 and 0.452 at 494 m and 881 m altitude compared with 0.731 and 0.788 measured with near-surface references, respectively. Albedo profiles show an all-sky maximum at 150 m above surface level due to local surface inhomogeneity, and an averaged vertical change rate of − 0.040/100 up to 750 m aboveground level (clear sky) and − 0.034/100 m (overcast). Profiling of arctic low-level clouds reveals distinct vertical gradients in all radiative fluxes but longwave upward at the cloud top. Observed radiative cooling at the top of a partly dissolving stratus cloud with heating rates of − 40.4 to − 62.1 Kd−1 in subsequent observations is exemplified.<br />Bundesrepublik Deutschland, Deutscher Wetterdienst, vertreten durch den Vorstand, Deutsche Meteorologische Bibliothek (4242)
- Subjects :
- Albedo
010504 meteorology & atmospheric sciences
Radiative cooling
0208 environmental biotechnology
02 engineering and technology
Atmospheric sciences
01 natural sciences
Troposphere
Radiative flux
Arctic
Altitude
Clouds
Radiative transfer
0105 earth and related environmental sciences
General Environmental Science
Atmosphere
Longwave
020801 environmental engineering
ddc:551.5
Overcast
13. Climate action
General Earth and Planetary Sciences
Environmental science
Heating rates
In-situ profiling
Subjects
Details
- ISSN :
- 26621509 and 26621495
- Volume :
- 1
- Database :
- OpenAIRE
- Journal :
- Bulletin of Atmospheric Science and Technology
- Accession number :
- edsair.doi.dedup.....c56df37215ce34dfc5c7079b3b427324