Occurrence of shallow cold flows in the winter atmospheric boundary layer of interior of Alaska
Tóm tắt
During winters, the absence of solar radiation combined with clear skies and weak synoptic forcing enables cold pooling in the complex topographic basins of interior Alaska. Under these conditions, shallow, small-scale cold flows originating within, or flowing from, north-facing semi-enclosed basins are able to penetrate the frigid atmospheric boundary layer (ABL) of the open south-facing basins. This paper introduces the Winter Boundary Layer Experiment carried out during three consecutive periods in Fairbanks (2009–2011) and examines observational results illustrating the changes in the mean and turbulent state of the ABL during the occurrence of shallow flows. Observations introduced here demonstrate that during flow penetration, surface layer stratification is destroyed allowing mixing and thermal stabilization of the basin cooling regime. Evidence of upper level ABL thermal turbulence related to shear driven flow is introduced and discussed. Basin-scale turbulent heat fluxes are shown to reach −20 Wm−2 during flow occurrence.
Tài liệu tham khảo
Acevedo O, Moraes O, Degrazia G, Medeiros L (2006) Intermittency and the exchange of scalars in the nocturnal surface layer. Boundary Layer Meteorol 119:41–55
Benson C (1965) Ice fog: low temperature air pollution, defined with Fairbanks, Alaska as type locality. University of Alaska Fairbanks (College), Geophysical Institute, Alaska, p 134
Benson C (1970) Ice fog. Weather 25:11–18
Beyrich F, Weill A (1993) Some aspects of determining the stable boundary-layer depth from sodar data. Boundary Layer Meteorol 63:97–116
Billelo M (1966) Survey of arctic and subarctic temperature inversions. U.S. Army Cold Regions Research & Engineering Laboratory, Hanover N. H. pp 36. TR 161
Bourne S, Bhatt U, Zhang J, Thoman R (2010) Surface-based temperature inversions in Alaska from a climate perspective. Atmos Res 95:353–366
Bowling S, Ohtake T, Benson C (1968) Winter pressure systems and ice fog in Fairbanks, Alaska. J Appl Meteor 7:961–968
Brown E, Hall F (1978) Advances in atmospheric acoustics. Rev Geophys Space Phys 16:47–110
Cassano E, Cassano J, Nolan M (2011) Synoptic weather pattern controls on temperature in Alaska. J Geophys Res 116:D11108. doi:10.1029/2010JD015341
Clements C, Whiteman C, Horel J (2003) Cold-air-pool structure and evolution in a mountain basin: Peter Sinks, Utah. J Appl Meteorol 42:752–768
Conangla L, Cuxart J, Soler M (2008) Characterization of the nocturnal boundary layer at a site in northern Spain. Boundary Layer Meteorol 128:255–276
Cuxart J (2008) Nocturnal basin low-level jets: an integrated study. Acta Geophys Pol 56:100–113
Cuxart J, Yagüe C, Morales G et al (2000) Stable atmospheric boundary-layer experiment in Spain (SABLES 98): a report. Boundary Layer Meteorol 96:337–370
de Bruin H (2002) Introduction: renaissance of scintillometry. Boundary Layer Meteorol 105(1):1–4
de Bruin H, Kohsiek W, van den Hurk B (1993) A verification of some methods to determine the fluxes of momentum, sensible heat and water vapour using standard deviation and structure parameter of scalar meteorological quantities. Boundary Layer Meteorol 63:231–257
Doran J, Fast J, Horel J (2002) The VTMX 2000 Campaign. Bull Am Met Soc 83(4):537–551
Emeis S, Türk M (2004) Frequency distributions of the mixing height over an urban area from SODAR data. Meteorol Z 13(5):361–367
Fernando H, Hunt J, Carruthers D (1994) Turbulence, waves and mixing at stratified density interfaces: modeling and experiments. In: Castro I, Rockliff N (eds) Stably stratified flows. Oxford University Press, New York, pp 175–200
Fochesatto GJ, Drobinski P, Flamant C, Guedalia D, Sarrat C, Flamant PH, Pelon J (2001) Evidence of dynamical coupling between the residual layer and the developing convective boundary layer. Boundary Layer Meteorol 99(3):451–464
Foken T (2008) Micro-meteorology. Springer, Berlin
Goring D, Nikora V (2002) Despiking acoustic Doppler velocimeter data. J Hydraul Eng 117:117–126
Google Inc. (2009) Google Earth (Version 5.1.3533.1731) [Software], 2009
Hartmann B, Wendler G (2005) Climatology of the winter surface temperature inversion in Fairbanks, Alaska. In: Proceedings of the 85th annual meeting of the american meteorological society, San Diego, CA, USA, pp 1–7
Holmgren B, Spears L, Wilson C, Benson C (1975) Acoustic soundings of the Fairbanks temperature inversions. In: Weller G, Bowling SA (eds) Climate of the Arctic. Proceedings of the AAAS-AMS conference, Fairbanks, pp 293–306
Kaimal J, Finnigan J (1994) Atmospheric boundary layer flows: their structure and measurement. University Press, Oxford, p 289
Kleissl J, Gomez J, Hong S, Hendrickx J, Rahn T, Defoor W (2008) Large aperture scintillometer intercomparison study. Boundary Layer Meteorol 128:133–150
Lee S-J, Kawai H (2011) Mixing depth estimation from operational JMA and KMA wind-profiler data and its preliminary applications: examples from four selected sites. J Meteorol Soc Jpn 89:15–28
Lee X, Massman W, Law B (2004) Handbook of micrometeorology: a guide for surface flux measurement and analysis. Kluwer Academic, Dordrecht
Mahrt L, Larsen S (1982) Small scale drainage front. Tellus 34:579–587
Mahrt L, Vickers D, Nakamura R, Sun J, Burns S, Lenschow D (2001) Shallow drainage flows. Boundary Layer Meteorol 101:243–260
Malingowski J (2010) An observational study of the surface-based radiation temperature inversion in Fairbanks, Alaska. Dissertation, University of Alaska Fairbanks
Martinez D, Jimenez M, Cuxart J, Mahrt L (2010) Heterogeneous nocturnal cooling in a large basin under very stable conditions. Boundary Layer Meteorol. doi:10.1007/s10546-010-9522-z
Mayfield J (2011) The Micrometeorological effects of drainage flow on the atmospheric boundary layer. Dissertation, University of Alaska Fairbanks
Mayfield J, Fochesatto G (2013) The layered structure of the winter atmospheric boundary layer in the interior of Alaska. J Appl Meteor Climatol 52:953–973. doi:http://dx.doi.org/10.1175/JAMC-D-12-01.1
Meijninger W, Hartogensis O, Kohsiek W, Hoedjes J, Zuurbier R, De Bruin H (2002) Determination of area-averaged sensible heat fluxes with a large aperture scintillometer over a heterogeneous surface—Flevoland field experiment. Boundary Layer Meteorol 105(1):37–62
Moene A, W Meijninger, O Hartogensis, B Heusinkveld, H de Bruin (2005) The effect of finite accuracy in the manufacturing of large aperture scintillometers. Internal Report 2005/1, Meteorology and Air Quality Group, Wageningen University, Wageningen, the Netherlands, pp 99
Mölders N, Kramm G (2010) A case study on wintertime inversions in Interior Alaska with WRF. Atmos Res 95:314–332
Neff W (1975) Quantitative evaluation of acoustic echoes from the planetary boundary layer. Tech. Rep. ERL 322-WPL, National Oceanic and Atmospheric Administration, pp 34
Neff W, Coulter R (1988) Acoustic remote sensing. In: Lenschow D (ed) Probing the atmospheric boundary layer. American Meteorological Society, Boston, pp 201–235
Neff W, King C (1989) The accumulation and pooling of drainage flows in a large basin. J Appl Meteorol 28:518–529
Pinto J, Parsons D, Brown W, Cohn S, Chamberlain N, Morley B (2006) Coevolution of down-valley flow and the nocturnal boundary layer in complex terrain. J Appl Meteorol 45:1429–1449
Simpson J (1987) Gravity Currents: In the Environment and the Laboratory. Ellis Horwood Limited
Soler M, Infante C, Buenestado P, Mahrt L (2002) Observations of nocturnal drainage flow in a shallow gully. Boundary Layer Meteorol 105:253–273
Sorbjan Z (1989) Structure of the atmospheric boundary layer. Prentice Hall, New Jersey
Tatarski V (1961) Wave propagation in a turbulent medium. McGarw Hill New, York pp 285
Vickers D, Mahrt L (1997) Quality control and flux sampling problems for tower and aircraft data. J Atmos Ocean Technol 14:512–526
Vosper S, Brown A (2008) Numerical simulations of sheltering in valleys: the formation of nighttime cold-air pools. Boundary Layer Meteorol 127:429–448
Wendler G, Jayaweera K (1972) Some measurements on the development of the surface inversion in Central Alaska during winter. Pure Appl Geophys 92:209–221
Wesely M (1976) The combined effect of temperature and humidity fluctuations on refractive index. J Appl Meteorol 15:43–49
Whiteman C, Zhong S (2008) Downslope flows on a low-angle slope and their interactions with valley inversions. J Appl Meteorol 47:2023–2038
Whiteman C, Hoch S, Poulos G (2009) Evening temperature rises on valley floors and slopes: their causes and their relationship to the thermally driven wind system. J Appl Meteorol 48:776–788
Whiteman C, Hoch S, Lehner M, Haiden Th (2010) Nocturnal cold-air intrusions into a closed basin: observational evidence and conceptual model. J Appl Meteorol 49(9):1894–1905
Wolyn P, McKee T (1989) Deep stable layers in the intermountain western United States. Mon Weather Rev 117:461–472
Wyngaard J, Izumi Y, Collins S (1971) Behavior of the refractive-index-structure parameter near the ground. J Opt Soc Am 61:1646–1650
Zängl G (2005a) Formation of extreme cold-air pools in elevated sinkholes: an idealized numerical process study. Mon Weather Rev 133:925–941
Zängl G (2005b) Dynamical aspects of wintertime cold-air pools in an alpine valley system. Mon Weather Rev 133:2721–2740
Zhong S, Whiteman C, Bian X, Shaw W, Hubble J (2001) Meteorological processes affecting the evolution of a wintertime cold air pool in the Columbia basin. Mon Weather Rev 129:2600–2613