نتایج جستجو برای: winter

تعداد نتایج: 50571  

2011
Nicholas C. Parazoo

OF DISSERTATION Moist Synoptic Transport of CO2 Along Midlatitude Storm Tracks, Transport Uncertainty, and Implications for Flux Estimation Mass transport along moist isentropic surfaces on baroclinic waves represents an important component of the atmospheric heat engine that operates between the equator and poles. This is also an important vehicle for tracer transport, and is correlated with e...

2003
A. Kahraman

chickpea (Cicer arietinum L.) is reportedly controlled by at least five genes with tolerance dominant over Lentil (Lens culinaris Medik.) germplasm with sufficient winter susceptibility (Malhotra and Singh, 1990). hardiness to survive most winters in cold northern areas is available. However, the use of that germplasm in breeding programs is hampered One of the major problems in characterizing ...

2012
F. Kaspar

Climate simulations of the Eemian interglacial and the last glacial inception have been performed by forcing a coupled ocean-atmosphere general circulation model with in-solation patterns of these periods. The parameters of the Earth's orbit have been set to conditions of 125 000 and 115 000 years before present (yr BP). Compared to today, 5 these dates represent periods with enhanced and weake...

2005
R. K. SCOTT L. M. POLVANI

This paper examines the nature and robustness of internal stratospheric variability, namely the variability resulting from the internal dynamics of the stratosphere itself, as opposed to that forced by external sources such as the natural variability of the free troposphere. Internal stratospheric variability arises from the competing actions of radiative forcing, which under perpetual winter c...

2008
P. Lionello

Future climate projections show higher/lower winter (Dec-Jan-Feb) precipitation in the northern/southern Mediterranean region than in present climate conditions. This paper analyzes the results of regional model simulations of the A2 and B2 scenarios, which confirm this opposite precipitation change and link it to the change of cyclone activity. The increase of the winter cyclone activity in fu...

Journal: :IEEE Intelligent Systems 2008
Fei-Yue Wang Ruqian Lu Daniel Dajun Zeng

On the basis of suggestions from the IEEE Intelligent Systems editorial board, we took a dual approach to this issue to both broaden community participation and realize the maximum impact of this collaborative endeavor. In early 2007, we distributed an open call for papers to the Chinese AI and computer science communities. Two publication outlets for the same thematic topic were offered: a spe...

2017
M. JUCKER

The processes regulating the climatology and annual cycle of the tropical tropopause layer (TTL) and cold point are not fully understood. Three main drivers have been identified: planetary scale equatorial waves excited by tropical convection, planetary scale extratropical waves associated with the deep Brewer-Dobson Circulation, and synoptic scale waves associated with the midlatitude storm tr...

1966
A. WIIN-NIELSEN MARGARET DRAKE

The contribution from the divergent part of the horizontal wind to the energy conversion between the vertical shear flow and the vertical mean flow has been computed using atmospheric data from the isobaric surfaces: 850, 700, 500, 300, and 200 mb. The new calculations supplement earlier computations giving the energy conversion based on an assumption that the horizontal winds are non-divergent...

2002
JAMES A. BRADBURY BARRY D. KEIM CAMERON P. WAKE

Using monthly gridded 500-hPa data, two synoptic indices are defined to better understand the principle mechanisms controlling intraseasonal to multiannual winter climate variability in New England (NE). The ‘‘trough axis index’’ (TAI) is created to quantify the mean longitudinal position of the common East Coast pressure trough, and the ‘‘trough intensity index’’ (TII) is calculated to estimat...

2002
N. W. Halverson E. M. Leitch C. Pryke J. E. Carlstrom W. L. Holzapfel M. Dragovan J. K. Cartwright B. S. Mason S. Padin T. J. Pearson A. C. S. Readhead M. C. Shepherd

We present measurements of anisotropy in the cosmic microwave background (CMB) from the first season of observations with the Degree Angular Scale Interferometer (DASI). The instrument was deployed at the South Pole in the austral summer 1999–2000, and we made observations throughout the following austral winter. We present a measurement of the CMB angular power spectrum in the range 100 < l < ...

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