Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Outgoing longwave radiation"”.
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Observational Studies of Wave Disturbances in the Tropical Pacific and Their Relationship With Deep Cloud Activity (Global Atmospheric Research Program(garp), Fgge, Gate, Itcz, Spcz, Sst)
… Global Experiment, Level III-b data and the outgoing longwave radiation data are used to investigate relationships between deep cloud activity and large-scale meteorological fields from May to September in 1979. Discussion is focused on the situations in the eastern Pacific for the following …
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A model study of the interannual variability of Tanzanian rainfall
… derivedfrom the GPCP precipitation and NCEP Outgoing Longwave Radiation (OLR) andgeopotential anomalies were also compared to those from the HadAM3 model.
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Intra-seasonal convection dynamics over Southwest and Northeast Tanzania : an observational study
… December, 1979 to May, 1994 pentad (5-day mean) Outgoing Longwave Radiation (OLR) as an indicator of convective cloud distribution. Area-averaged OLR indices are derived for the two areas. Time series of OLR indices for MAM and DJF indicate large quasi-periodic OLR fluctuations in some years and …
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Seasonal and intra-seasonal dynamics and precursors of rainfall over northern Tanzania
… of gridded sea surface temperatures (SST),outgoing longwave radiation (OLR) and winds in the lower- and upper troposphere, the- precursors of flood and drought are assessed. Composites are averaged for the specific season and for periods 2, 4 and 6 months prior; and the historical mean is …
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A Climatological Analysis of Upper-Tropospheric Velocity Potential Fields using Global Weather Reanalysis, 1958-2020
… correlated variables to velocity potential of outgoing longwave radiation (OLR) and daily precipitation rate were used and directly compared with independent OLR and precipitation datasets to determine the reanalysis' level of agreement with the independent data. The ECMWF ERA5 held the highest …
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The impact of upper tropospheric temperatures and radiation on idealized tropical cyclones
… and the complex interactions between clouds, radiation, and storm dynamics. Idealized Weather Research and Forecasting (WRF) ensembles were conducted using a combination of three different tropopause temperatures (196, 199, and 202 K) with different radiation schemes (full diurnal radiation, …
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ISOTOPIC CONSTRAINTS ON ATMOSPHERIC MOISTURE TRANSPORT PROCESSES IN SOUTH AMERICA
… isotope ratios (δD), mixing ratios (q), and outgoing longwave radiation (OLR) show that upwind convective intensity controls the seasonal variability in isotopic ratios in tropical Andean water vapor and leads to lower isotopic ratios than predicted by equilibrium isotope fractionation models …
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The analysis of tropical temperate trough-associated rainfall onsets and their influence on maize yields in the Maize Triangle, South Africa
… included observed TTT cases, daily rainfall, outgoing longwave radiation (OLR) and maize yields were obtained from various providers. These datasets were processed, merged and analysed accordingly using various tools and methods to address the study objectives. The study analysed the …
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The Study of the Indian Ocean Response to Climatic Events Using Satellite Observations and Model Simulations
… in the Indian Ocean as shown by a lag between Outgoing Longwave Radiation (OLR) and SSH in wavelet analysis. Equatorial Rossby waves also interact with the atmospheric component of the MJO through changes in the mixed layer depth while the Rossby waves propagate westward.</p>
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Intra-seasonal oscillations of convection over southern Africa
… water budget or convection as identified by an outgoing longwave radiation (OLR) index and P-E index. A longer 40-60 day oscillation or Madden Julian Oscillation (MJO) and a shorter 20-30 day ISO are identified. The interaction between the Rossby waves of the mid-latitudes and the MJO of tropics …
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On the nature of the atmospheric cloud radiative effect and its impact on tropical convection
… that decrease is offset by reductions in outgoing longwave radiation owing to increases in water vapor. The absorption of radiant energy by the clouds warms the upper tropical troposphere compared to simulations where ACRE is artificially removed. We show this increase in stability …
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THE VARIABILITY OF DROUGHT DYNAMICS IN THE SOUTHWEST UNITED STATES AND AN ANALYSIS OF DROUGHT RISK IN THE NORTHEASTERN UNITED STATES
… and CMIP6, have a wet bias in the northeast. Radiation at the surface of the Earth is a balance between incoming solar radiation and outgoing longwave radiation. The surface may also lose energy through sensible heat loss and outgoing latent energy. This important balance is highly sensitive …
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Modulation of South African summer rainfall by global climatic processes
… fluctuations in sea surface temperature (SST), outgoing longwave radiation (OLR) and tropospheric winds. OLR is used as a proxy for convective intensity and for the identification of areas of sympathy and opposition to convection over South Africa. Wind data (and derived parameters) are employed …
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Spatio-temporal variability of aerosols in the tropics relationship with atmospheric and oceanic environments
Earth's radiation budget is directly influenced by aerosols through the absorption of solar radiation and subsequent heating of the atmosphere. Aerosols modulate the hydrological cycle indirectly by modifying cloud properties, precipitation and ocean heat storage. In addition, polluting aerosols …
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Energy and Moisture Transport in the Earth Climate System: Mean State and the Perturbation Response
… local warming over Antarctica leads to increased outgoing longwave radiation, which drives anomalous southward energy transport towards the continent and cooling elsewhere. Atmosphere and ocean both anomalously transport energy southward in the Southern Hemisphere. Near Antarctica, poleward energy …
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Satellite-based Analysis and Forecast Evaluation of Aviation Contrails
… energy balance by reflecting incoming shortwave radiation (a cooling effect) and absorbing outgoing longwave radiation (a warming effect), with the net effect estimated as warming. The ice supersaturated regions that allow for contrails to persist are known to be horizontally wide but vertically …