Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Variability of the Marine Atmospheric Boundary Layer in the Greenland Sea Marginal Ice Zone - A Case Study
Author: The Variability of the Marine Atmospheric Boundary Layer in the Greenland Sea Marginal Ice Zone
Author: Karl L. DinklerPublisher:
ISBN:
Category : Boundary layer (Meteorology)
Languages : en
Pages : 0
Book Description
The vertical structure of the atmospheric boundary layer in the East Greenland Sea/Fram Strait marginal ice zone (MIZ) is examined for various wind flow regimes with respect to the ice edge. Rawinsonde profiles and surface observations collected from three ships during MIZEX-87 (20 March - 11 April 1987) served as the data set for the examination. Three specific flow regimes are discussed: On-ice flow, off-ice flow, and flow parallel to the ice. On-ice flow resulted in deep, moist mixed layers capped by high weak inversions at the MIZ. Off-ice flow resulted in multiple surface and elevated inversions, with specific humidity highest within an elevated lower-tropospheric layer and dry regions near the surface and aloft. Parallel flow led to the development of strikingly different boundary layer regimes separated by the ice edge: Over ice, deep surface and elevated inversions were associated with alternating moist and dry layers in the lower troposphere; over water, multiple elevated inversions were associated with an elevated lower-tropospheric moist layer and dry regions near the surface and alot. Possible physical processes important for the development of the observed features are discussed. Theses. (fr).
Masters Theses in the Pure and Applied Sciences
Author: Wade H. ShaferPublisher: Springer Science & Business Media
ISBN: 1461573947
Category : Science
Languages : en
Pages : 430
Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Oata Analysis and Synthesis (CINOAS) * at Purdue. University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 33 (thesis year 1988) a total of 13,273 theses titles from 23 Canadian and 1 85 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 33 reports theses submitted in 1988, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Scientific and Technical Aerospace Reports
Author: Government Reports Annual Index
Author: Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1720
Book Description
Government Reports Announcements & Index
Author: Technical Reports Awareness Circular : TRAC.
Author: Mesoscale Features and Atmospheric Refraction Conditions of the Arctic Marginal Ice Zone
Author: J. A. McNittPublisher:
ISBN:
Category :
Languages : en
Pages : 129
Book Description
This thesis summarizes the Marginal Ice Zone Experiment (MIZEX-83) conducted in the Arctic during the summer of 1983 and describes the mesoscale features and atmospheric refraction conditions. The three case studies examined are: warm air advection over dense pack ice causing strong elevated ducting and subrefraction; cold air advection over relatively open water causing shallow convection and normal refraction conditions; and large scale subsidence in the western quadrants of an anticyclone leading to super-refraction and weak ducting. Developing synoptic scale cyclones adjacent to the MIZEX-83 area often determined the airflow over the region. The observed large horizontal sea surface temperature gradients were the dominant forcing mechanisms on surface layer stability. Trapping layers associated with subsidence inversions can be located on satellite imagery by assuming that stratiform clouds form immediately below the inversion. Uniform cloud and refraction layers were not common during MIZEX-83 due to strong mesoscale variability. Factors affecting inversion height include subsidence and entrainment mixing. Bulk Richardson number value for locations over the open water and pack ice show significant variability in stability conditions across the MIZ. Keywords: Fram Strait; East Greenland Sea; ABL mixing; and Atmospheric boundary layer.
The Atmospheric Boundary Layer Over Polar Marine Surfaces
Author: Publisher: DIANE Publishing
ISBN: 142891661X
Category :
Languages : en
Pages : 45
Book Description
Arctic Cyclones and Marginal Ice Zone (MIZ) Variability
Author: Steven John RutherfordPublisher:
ISBN:
Category :
Languages : en
Pages : 81
Book Description
The Seasonal Ice Zone Experiment (SIZEX), conducted in January 1992, was designed as the European Space Agency's ERS-1 synthetic-aperature radar (SAR) validation experiment. The satellite was placed in a three day exact repeat orbit, with ascending and descending passes which crossed the Greenland Sea marginal ice zone. In conjunction with SAR imagery collected by the Nansen Environmental and Remote Sensing Center, the research vessel Hakon Mosby recorded meteorological data on station near the ice edge. The marginal ice zone was subjected to atmospheric and oceanographic forcing during the 7-16 January period which resulted in significant changes in ice edge morphology. As intense low pressure systems propagated across the Greenland Sea, strong easterly and northerly winds dominated oceanographic forcing and created a compact ice edge which correlated with the 50% ice concentration isopleth from the SSM/I passive microwave sensor. Conversely, during periods of weak atmospheric forcing, the ice edge became diffuse and the ice edge morphology was determined by a variety of oceanic circulations. In this instance the actual ice edge position was well correlated with a 30% concentration isopleth.