Structure of a low-level jet over Lower Cook Inlet, Alaska
During February 1982 a NOAA research aircraft investigated a cold, low-level jet blowing from a gap between mountain ranges on the west side of Cook Inlet, Alaska. The jet blew 200 km southeastward across Cook Inlet between the Kenai Peninsula and the Kodiak archipelago, passing into the Gulf of Ala...
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| Veröffentlicht in: | Monthly weather review 1990-12, Vol.118 (12), p.2568-2578 |
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| creator | MACKLIN, S. A BOND, N. A WALKER, J. P |
| description | During February 1982 a NOAA research aircraft investigated a cold, low-level jet blowing from a gap between mountain ranges on the west side of Cook Inlet, Alaska. The jet blew 200 km southeastward across Cook Inlet between the Kenai Peninsula and the Kodiak archipelago, passing into the Gulf of Alaska where it merged with the large-scale marine wind field. Measurement commenced similar to 35 km downstream of the seaward end of the gap. The jet's internal boundary layer accelerated by 5% and grew 20% in depth for similar to 50 km; thereafter, wind speed and boundary-layer depth were nearly constant for the next 100 km. The strongest winds (>20 m/s at a height of 80 m) were observed on the south side of the jet's thermal axis and 90 km downstream from the coast. Budget analyses reveal that the down-gradient acceleration within the jet was principally opposed by surface friction, and the cold air advection was balanced by a strong upward-directed sensible heat flux from Cook Inlet and entrainment of warmer air from aloft. (DBO) |
| doi_str_mv | 10.1175/1520-0493(1990)118<2568:soallj>2.0.co;2 |
| format | Article |
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Budget analyses reveal that the down-gradient acceleration within the jet was principally opposed by surface friction, and the cold air advection was balanced by a strong upward-directed sensible heat flux from Cook Inlet and entrainment of warmer air from aloft. 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The strongest winds (>20 m/s at a height of 80 m) were observed on the south side of the jet's thermal axis and 90 km downstream from the coast. Budget analyses reveal that the down-gradient acceleration within the jet was principally opposed by surface friction, and the cold air advection was balanced by a strong upward-directed sensible heat flux from Cook Inlet and entrainment of warmer air from aloft. 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| ispartof | Monthly weather review, 1990-12, Vol.118 (12), p.2568-2578 |
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| language | eng |
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| source | Free E-Journal (出版社公開部分のみ）; 美国气象学会期刊（NSTL购买）; Alma/SFX Local Collection |
| subjects | Earth, ocean, space Exact sciences and technology External geophysics Marine Meteorology Weather analysis and prediction |
| title | Structure of a low-level jet over Lower Cook Inlet, Alaska |
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