@article{fdi:010053112,
  title = {{S}ky longwave radiation on tropical {A}ndean glaciers : parameterization and sensitivity to atmospheric variables},
  author = {{S}icart, {J}ean-{E}mmanuel and {H}ock, {R}. and {R}ibstein, {P}ierre and {C}hazarin, {J}ean-{P}hilippe},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n mountain environments, longwave radiation provides large amounts of melt energy for high-albedo snow surfaces and can dominate in the energy balance of snow or glacier surfaces under cloudy skies. {T}his study examines the atmospheric controls of sky longwave radiation at {G}laciar {Z}ongo, {B}olivia (16 degrees 15' {S}, 5060 m a.s.l.) over an entire year to derive a parameterization suitable for melt studies. {T}ropical glaciers are characterized by a pronounced seasonality of longwave radiation, due to cloud emissions during the wet season that strongly enhance the small emissivity of the thin and dry clear-sky atmosphere at very high altitudes. {C}lear-sky radiation is well simulated as a function of air temperature and humidity, but changes in humidity atmospheric profiles from daytime to night-time entail different optimized coefficients for hourly and daily data. {C}loud emission, which enhances clear-sky emissivity by up to 55%, with an average of 20%, is estimated using daily atmospheric transmissivity for solar radiation. {P}artial correlations show that in high mountains cloud emissions control the variations of longwave radiation, far more than clear-sky emissivity and temperature of the emitting atmosphere. {A}n independent test on {G}laciar {A}ntizana in the humid tropics of {E}cuador (0 degrees 28' {S}, 4860 m a.s.l.) indicates that the parameterization is robust for the {C}entral {A}ndes.},
  keywords = {{C}hazarin est {HSM} {UR}050 et tech reseau {GLACOCLIM} pour {HSM} je te laisse ajouter en {UMR} si necessaire ??? pas ds signature !},
  booktitle = {},
  journal = {{J}ournal of {G}laciology},
  volume = {56},
  numero = {199},
  pages = {854--860},
  ISSN = {0022-1430},
  year = {2010},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053112},
}