Maintenance of Lower Tropospheric Temperature Inversion in the Saharan Air Layer by Dust and Dry Anomaly

  title={Maintenance of Lower Tropospheric Temperature Inversion in the Saharan Air Layer by Dust and Dry Anomaly},
  author={Sun Wong and Andrew E. Dessler and Natalie M. Mahowald and Ping Yang and Q. Feng},
  journal={Journal of Climate},
The role of Saharan dust and dry anomalyin maintaining the temperature inversion in the Saharan air layer (SAL) is investigated. The dust aerosol optical thickness (AOT) in the SAL is inferred from the measurements taken by Aqua Moderate Resolution Imaging Spectroradiometer (MODIS), and the corresponding temperature and specific humidity anomalies are identified using the National Centers for Environmental Prediction (NCEP) data in August‐September over the North Atlantic tropical cyclone (TC… 

Transport of the Saharan dust air plumes over the tropical North Atlantic from FORMOSAT–3/COSMIC observation

Abstract Long–range transport of the Saharan dust plumes during May–August of each year is a prominent feature over the tropical North Atlantic. Observations of temperature profiles are highly

Radiative Effects of Increased Water Vapor in the Upper Saharan Air Layer Associated With Enhanced Dustiness

  • C. Ryder
  • Environmental Science
    Journal of Geophysical Research: Atmospheres
  • 2021
The Saharan Air Layer (SAL) is known as an elevated, well‐mixed, warm, dry, frequently dusty layer and plays an important role in regional climate and dust transport. A new analysis of aircraft

Study on Atlantic Tropical Cyclogenesis and Saharan Air Layer Simulated Using WRF / Chem Coupled with an AOD Data Assimilation System

This study investigated the dust radiative effects on tropical cyclogenesis and the Saharan Air Layer (SAL) over the Atlantic Ocean by using the Gridpoint Statistical Interpolation threedimensional

Modification of Saharan air layer and environmental shear over the eastern Atlantic Ocean by dust-radiation effects

[1] This study investigates the influence of dust-radiation effects on the modification of the Saharan air layer (SAL) and environmental shear. A tracer model based on the Weather Research and

Tropical Atlantic dust and the zonal circulation

This study examines the factors driving the variability of Saharan dust over the subtropical Atlantic during summer. Monthly tropospheric dust concentrations from satellite-based model assimilation

Dust radiative effects on atmospheric thermodynamics and tropical cyclogenesis over the Atlantic Ocean using WRF-Chem coupled with an AOD data assimilation system

Abstract. This study investigated the dust radiative effects on atmospheric thermodynamics and tropical cyclogenesis over the Atlantic Ocean using the Weather Research and Forecasting Model with

Impacts of Saharan Dust on Atlantic Regional Climate and Implications for Tropical Cyclones

The radiative and microphysical properties of Saharan dust are believed to impact the Atlantic regional climate and tropical cyclones (TCs), but the detailed mechanism remains uncertain. In this

Long-term characterisation of the vertical structure of the Saharan Air Layer over the Canary Islands using lidar and radiosonde profiles: implications for radiative and cloud processes over the subtropical Atlantic Ocean

. Every year, large-scale African dust outbreaks comparison to the clean scenario) and a dust peak at ∼ 1.3 km height. Clean FT conditions were found above 2.3 km.Ourresults reveal the important role

Influence of Saharan Dust on the Large‐Scale Meteorological Environment for Development of Tropical Cyclone Over North Atlantic Ocean Basin

The tropical cyclones (TCs) frequently occur in the North Atlantic Ocean Basin, which is adjacent to West Africa, the largest global source of atmospheric dust. However, few studies have conducted

Identification of a new dust‐stratocumulus indirect effect over the tropical North Atlantic

Over the tropical North Atlantic, during boreal summer, both stratocumulus clouds and mineral aerosols are ubiquitous. We find that low cloud fraction increases in response to high mineral aerosols



Radiative Heating Rates for Saharan Dust

Abstract A combined longwave and shortwave radiative transfer model was used to determine effects of Saharan dust on the radiative fluxes and heating/cooling rates in the atmosphere. Cases are

Long‐term variability in Saharan dust transport and its link to North Atlantic sea surface temperature

An understanding of the atmospheric distribution of Saharan dust is crucial for understanding many Earth‐system processes. We demonstrate here a model simulation indicating that the August‐September

Principal component analysis of the evolution of the Saharan air layer and dust transport: Comparisons between a model simulation and MODIS and AIRS retrievals

[1] The onset and evolution of Saharan air layer (SAL) episodes during June–September 2002 are diagnosed by applying principal component analysis to the NCEP reanalysis temperature anomalies at 850

Dust transport and deposition observed from the Terra‐Moderate Resolution Imaging Spectroradiometer (MODIS) spacecraft over the Atlantic Ocean

[1] Meteorological observations, in situ data, and satellite images of dust episodes were used already in the 1970s to estimate that 100 Tg of dust are transported from Africa over the Atlantic Ocean

Impact of Desert Dust Radiative Forcing on Sahel Precipitation

The role of direct radiative forcing of desert dust aerosol in the change from wet to dry climate observed in the African Sahel region in the last half of the twentieth century is investigated using

The Impact of the Saharan Air Layer on Atlantic Tropical Cyclone Activity

A deep well-mixed, dry adiabatic layer forms over the Sahara Desert and Shale regions of North Africa during the late spring, summer, and early fall. As this air mass advances westward and emerges

Vertical and areal distribution of Saharan dust over the western equatorial north Atlantic Ocean

Aerosol measurements were made as a part of the Barbados Oceanographic and Meteorological Experiment (Bomex) during May, June, and July 1969. Maximum dust concentrations occurred between the

Dust plumes over the Pacific, Indian, and Atlantic oceans: Climatology and radiative impact

[1] Multiple satellite data sets in conjunction with the Monte Carlo Aerosol-CloudRadiation (MACR) model are employed to determine climatological distributions and radiative impacts of dust plumes

Radiative Forcing of Saharan Dust: GOCART Model Simulations Compared with ERBE Data

Abstract This study uses information on Saharan aerosol from a dust transport model to calculate radiative forcing values. The transport model is driven by assimilated meteorological fields from the

Suppression of deep convection over the tropical North Atlantic by the Saharan Air Layer

The effects of the dust‐laden Saharan Air Layer (SAL) on the occurrence of deep convection over the eastern and central tropical North Atlantic Ocean off‐shore of the African continent during