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| Content Provider | Springer Nature Link |
|---|---|
| Author | Kallistratova, Margarita A. Kouznetsov, Rostislav D. |
| Copyright Year | 2011 |
| Abstract | We evaluate the statistical properties of low-level jets (LLJs) observed by means of a network of Doppler sodars in the Moscow region, Russia. Continuous long-term measurements of the echo-signal intensity and wind-velocity profiles were carried out in July 2005 and in 2008–2010 synchronously in the centre of Moscow and at a rural site. The summertime nocturnal LLJs have a very clear diurnal cycle and exhibit features predicted by the Blackadar mechanism. In contrast, the long-lasting wintertime jets do not have any clear diurnal variability. The urban environment strongly influences LLJs in both seasons: above the city LLJs are higher, weaker and observed more rarely than at the rural site. In very cold periods (air temperature below −8°C) no LLJs were observed over the city, instead convection emerged in the urban boundary layer. The results are based on observations made in July 2005, January and December 2009, and January 2011. |
| Starting Page | 159 |
| Ending Page | 175 |
| Page Count | 17 |
| File Format | |
| ISSN | 00068314 |
| Journal | Boundary-Layer Meteorology |
| Volume Number | 143 |
| Issue Number | 1 |
| e-ISSN | 15731472 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2011-08-04 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Low-level jets Sodar Urban Boundary Layer Meteorology/Climatology Atmospheric Protection/Air Quality Control/Air Pollution |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atmospheric Science |
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