A5001030612- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Climate variability and models
- Meteorological Phenomena and Simulations
- Ionosphere and magnetosphere dynamics
- Oceanographic and Atmospheric Processes
- Geophysics and Gravity Measurements
- Atmospheric chemistry and aerosols
- Calibration and Measurement Techniques
- Atmospheric aerosols and clouds
- Earthquake Detection and Analysis
- Groundwater and Isotope Geochemistry
- Photovoltaic System Optimization Techniques
- Municipal Solid Waste Management
- Isotope Analysis in Ecology
- Cryospheric studies and observations
- Building Energy and Comfort Optimization
- Solar Radiation and Photovoltaics
- Urban Heat Island Mitigation
- Solar and Space Plasma Dynamics
- Landfill Environmental Impact Studies
- Clinical Nutrition and Gastroenterology
- Vehicle emissions and performance
- Healthcare Systems and Challenges
- Asphalt Pavement Performance Evaluation
University of Leicester
2012-2024
National Centre for Earth Observation
2012-2024
Mississippi State University
1990
Abstract Global‐scale changes in water vapor and responses to surface temperature variability since 1979 are evaluated across a range of satellite ground‐based observations, reanalysis (ERA5) coupled atmosphere‐only CMIP6 climate model simulations. Global‐mean column integrated increased by 1%/decade during 1988–2014 observations However, simulations overestimate trends this is partly explained past studies showing that internal suppressed observed warming period. Decreases low‐altitude...
Abstract. The Global Energy and Water cycle Exchanges (GEWEX) Data Assessments Panel (GDAP) initiated the GEWEX Vapor Assessment (G-VAP), which has main objectives to quantify current state of art in water vapour products being constructed for climate applications support selection process suitable by GDAP its production globally consistent energy products. During construction G-VAP data archive, freely available mature satellite reanalysis records with a minimum temporal coverage 10 years...
To date, a large variety of water vapour data records from satellite and reanalysis are available. It is key to understand the quality uncertainty these in order fully exploit avoid being employed incorrectly or misinterpreted. Therefore, it important inform users on accuracy limitations based consistent inter-comparisons carried out framework international assessments. Addressing this challenge major objective Global Water Energy Exchanges (GEWEX) vapor assessment (G-VAP) which was...
The accuracy of land surface temperature (LST) observations is critical to many applications. Any observation LST subject incomplete knowledge, so an accurate assessment the uncertainty budget critical. We present a comprehensive and consistent approach determining for products. apply this Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on-board Aqua satellite. In order generate model, new implementation generalised split-window algorithm applied, in which retrieval...
Monitoring the Earth Energy Imbalance (EEI) is of prime importance for a predictive understanding climate change. Furthermore, monitoring EEI gives an early indication on how well mankind doing in implementing Paris Climate Agreement. defined as small difference between incoming energy receives from Sun and outgoing lost by to space. The cumulated system, particularly oceans, due their substantial heat capacity, results global temperature rise. Currently best estimates absolute value EEI,...
Abstract Day-to-day variations in surface air temperature affect society many ways, but daily measurements are not available everywhere. Therefore, a global picture cannot be achieved with made situ alone and needs to incorporate estimates from satellite retrievals. This article presents the science developed EU Horizon 2020–funded EUSTACE project (2015–19, www.eustaceproject.org ) produce European multidecadal ensembles of analyses complementary those dynamical reanalyses, integrating...
Abstract. Satellite infrared emission instruments require efficient systems that can separate and flag observations which are affected by clouds aerosols. This paper investigates the identification of cloud aerosols from infrared, limb sounding spectra were recorded Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), a high spectral resolution Fourier transform spectrometer on European Space Agency's (ESA) ENVISAT (Now inoperative since April 2012 due to loss contact)....
Water vapour is a key greenhouse gas in the Earth climate system. In this golden age of satellite remote sensing, global observations water fields are made from numerous instruments measuring ultraviolet/visible, through infrared bands, to microwave regions electromagnetic spectrum. While these provide wealth information on columnar, free-tropospheric and upper troposphere/lower stratosphere amounts, there still an observational gap regarding resolved bulk planetary boundary layer (PBL)...
Abstract The tropospheric water vapor profile record from the Atmospheric Infrared Sounder (AIRS) now spans over a decade, making it valuable resource for climate studies. To be considered as Climate Data Record, is key that ultimate performance of these observations are understood. Global Energy and Water cycle Exchanges (GEWEX) assessment has been tasked with characterizing current state art in products currently available analysis. Within scope this exercise, profiles AIRS have assessed...
Abstract. The development of algorithms for the retrieval water cycle components from satellite data – such as total column vapor content (TCWV), precipitation (P), latent heat flux, and evaporation (E) has seen much progress in past 3 decades. In present study, we compare six recent satellite-based ERA5 (the European Centre Medium-Range Weather Forecasts' fifth reanalysis) freshwater flux (E−P) regarding global regional, seasonal interannual variation to assess degree correspondence among...
Abstract. Radiosonde soundings from the GCOS Reference Upper-Air Network (GRUAN) data record are shown to be consistent with Infrared Atmospheric Sounding Instrument (IASI)-measured radiances via LBLRTM (Line-By-Line Radiative Transfer Model) in part of spectrum that is mostly affected by water vapour absorption upper troposphere (from 700 hPa up). This result key for climate records, since GRUAN, IASI and constitute reference measurements or a radiative transfer model each their fields....
Abstract. Since 2007, the Meteorological Operational satellite (MetOp) series of platforms operated by European Organisation for Exploitation Satellites (EUMETSAT) has provided valuable observations Earth's surface and atmosphere meteorological climate applications. With 15 years data already collected, next generation MetOp satellites will see this measurement record extend to beyond 2045. Although a primary role is in operational meteorology, tropospheric temperature water vapour profiles...
Abstract. The Global Energy and Water cycle Exchanges (GEWEX) Data Assessments Panel (GDAP) initiated the GEWEX Vapor Assessment (G-VAP), which has main objectives to quantify current state of art in water vapour products being constructed for climate applications support selection process suitable by GDAP its production globally consistent energy products. During construction G-VAP data archive, freely available mature satellite reanalysis records with a minimum temporal coverage 10 years...
Abstract. The West African Monsoon (WAM) represents the main source of rainfall over Africa and thus has important socio-economic impacts. However, complex interactions large-scale circulation, convective dynamics microphysical processes pose a substantial challenge to reliably quantify atmospheric branches hydrological cycle in observations models. Making use recent advances retrieving isotopic composition tropospheric water vapour from space, we promote paired analysis H2O HDO investigate...
Abstract. Since 2011, the Global Energy and Water cycle Exchanges (GEWEX) Vapor Assessment (G-VAP) has provided performance analyses for state-of-the-art reanalysis satellite water vapour products to GEWEX Data Analysis Panel (GDAP) user community in general. A significant component of work undertaken by G-VAP is characterise quality uncertainty these records (i) ensure full exploitation (ii) avoid incorrect use or interpretation results. This study presents results from second phase G-VAP,...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Atmospheres. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Global changes in water vapor 1979-2020AuthorsRichardAllaniDKateWillettVijuJohnTimTrentSee all authors Richard AllaniDCorresponding Author• Submitting...
Abstract. Since 2011 the Global Energy and Water cycle Exchanges (GEWEX) Vapor Assessment (G-VAP) has provided performance analyses for state-of-the-art reanalysis satellite water vapour products to GEWEX Data Analysis Panel (GDAP) user community in general. A significant component of work undertaken by G-VAP is characterise quality uncertainty these records to; i) ensure full exploitation ii) avoid incorrect use or interpretation results. This study presents results from second phase G-VAP,...
Abstract. Radiosonde soundings from the GRUAN data record are shown to be consistent with IASI measured radiances via LBLRTM radiative transfer model in part of spectrum that is mostly affected by water vapour absorption upper troposphere (from 700 hPa up). This result key have consistency between radiosonde and satellite measurements for climate records, since GRUAN, constitute reference each their fields. specially case night time measurements. Although sample size small (16 cases), day...
Abstract Satellite observations of column‐averaged water isotopes are relatively new retrieval products that in need further situ evaluation. Such evaluation studies generally difficult to perform due the wide mismatch temporal and spatial scales between satellite based on instantaneous pixel averages during an overpass airborne measurements ranging up several hours over a km‐scale. In addition, topography, weather conditions particular cloudiness impose severe constraints exact collocation...
Abstract. Satellite infra-red emission instruments require efficient systems that can separate and flag observations which are affected by clouds aerosols. This paper investigates the identification of cloud aerosols from infra-red, limb sounding spectra recorded Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), a high spectral resolution, Fourier transform spectrometer on ENVISAT. Specifically, performance an existing aerosol particle detection method is simulated, with...
Figure S1: Time series of the different climate indices listed in Table B1 (main text) between January 1988 and December 2014.The corresponding autocorrelation coefficients for lag times 0 12 months are shown to right-handside each time series.
Abstract. The development of algorithms for the retrieval water cycle components from satellite data, such as total column vapor content (TCWV), precipitation (P), latent heat flux, and evaporation (E) has seen much progress in past three decades. In present study, we compare six recent satellite-based ERA5 (the European Centre Medium-Range Weather Forecasts' fifth reanalysis) freshwater flux (E–P) data regarding global regional, seasonal inter-annual variation to assess degree...