Climatological observations and predicted sublimation rates at Lake Hoare, Antarctica.
Journal of Climate
By: G.D. Clow, C.P. McKay, G.M. Simmons Jr., and R.A. Wharton Jr.
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Abstract
In December 1985, an automated meteorological station was established at Lake Hoare in the dry valley region of Antarctica. Here, we report on the first year-round observations available for any site in Taylor Valley. This dataset augments the year-round data obtained at Lake Vanda (Wright Valley) by winter-over crews during the late 1960s and early 1970s. The mean annual solar flux at Lake Hoare was 92 W m-2 during 1986, the mean air temperature -17.3 degrees C, and the mean 3-m wind speed 3.3 m s-1. The local climate is controlled by the wind regime during the 4-month sunless winter and by seasonal and diurnal variations in the incident solar flux during the remainder of the year. Temperature increases of 20 degrees-30 degrees C are frequently observed during the winter due to strong fo??hn winds descending from the Polar Plateau. A model incorporating nonsteady molecular diffusion into Kolmogorov-scale eddies in the interfacial layer and similarity-theory flux-profiles in the surface sublayer, is used to determine the rate of ice sublimation from the acquired meteorological data. Despite the frequent occurrence of strong winter fo??hns, the bulk of the annual ablation occurs during the summer due to elevated temperatures and persistent moderate winds. The annual ablation from Lake Hoare is estimated to have been 35.0 +/- 6.3 cm for 1986.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Climatological observations and predicted sublimation rates at Lake Hoare, Antarctica. |
| Series title | Journal of Climate |
| Volume | 1 |
| Issue | 7 |
| Year Published | 1988 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Climate |
| First page | 715 |
| Last page | 728 |
| Google Analytic Metrics | Metrics page |