A5062976072- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Spectroscopy and Laser Applications
- Economic and Social Issues
- Environmental Science and Technology
- Ocean Acidification Effects and Responses
- Air Quality and Health Impacts
- Methane Hydrates and Related Phenomena
- Climate Change Policy and Economics
- Air Quality Monitoring and Forecasting
- Water Quality Monitoring and Analysis
- Nursing Roles and Practices
- Arctic and Russian Policy Studies
- Laser-induced spectroscopy and plasma
- Date Palm Research Studies
- Spectroscopy and Chemometric Analyses
- Hydrocarbon exploration and reservoir analysis
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2001-2005
Abstract. The remote sensing of the atmospheric greenhouse gases methane (CH4) and carbon dioxide (CO2) in troposphere from instrumentation aboard satellites is a new area research. In this manuscript, results obtained observations up-welling radiation near-infrared by SCIAMACHY (Scanning Imaging Absorption spectroMeter for Atmospheric CHartographY), which flies on board ENVISAT, are presented. Vertical columns CH4, CO2 oxygen (O2) have been retrieved (air or) O2-normalized CH4 column...
Abstract. Carbon monoxide total column amounts in the atmosphere have been measured High Northern Hemisphere (30°-90° N, HNH) between January 2002 and December 2003 using infrared spectrometers of high moderate resolution Sun as a light source. They were compared to ground-level CO mixing ratios from space by Terra/MOPITT instrument. All these data reveal increased abundances 2002-2003 comparison unperturbed 2000-2001 period. Maximum anomalies observed September August 2003. Using simple...
During Arctic winters with a cold, stable stratospheric circulation, reactions on the surface of polar clouds (PSCs) lead to elevated abundances chlorine monoxide (ClO) that, in presence sunlight, destroy ozone. Here we show that PSCs were more widespread during 1999/2000 winter than for any other past two decades. We have used three fundamentally different approaches derive degree chemical ozone loss from ozonesonde, balloon, aircraft, and satellite instruments. losses derived these...
Long‐term time series of hydrogen chloride (HCl) and chlorine nitrate (ClONO 2 ) total column abundances has been retrieved from high spectral resolution ground‐based solar absorption spectra recorded with infrared Fourier transform spectrometers at nine NDSC (Network for the Detection Stratospheric Change) sites in both Northern Southern Hemispheres. The data sets span up to 24 years most extend until end 2001. Cl y (defined here as sum HCl ClONO columns) three locations longest time‐span...
Carbon monoxide abundances in the atmosphere have been measured between January 1996 and December 2001 high Northern Hemisphere (HNH) (30°–90°N) using two different approaches: total column amounts of CO retrieved from infrared solar spectra mixing ratios situ at ground‐based stations. The data were averaged, anomalies HNH burden (deviations tropospheric mass 30°N 90°N mean seasonal profile, determined as 5 year average) analyzed. obtained agree well both show maxima, by far largest October...
Chemical ozone loss rates inside the Arctic polar vortex were determined in early 1998 and 1999 by using Match technique based on coordinated ozonesonde measurements. These two winters provide only opportunities recent years to investigate chemical a warm under threshold conditions, i.e., where preconditions for chlorine activation, hence destruction, occurred occasionally. In 1998, results obtained January February between 410 520 K. The overall was observed be largely insignificant, with...
With the Match technique, which is based on coordinated release of ozonesondes, chemical ozone loss rates in Arctic stratospheric vortex early 1997 have been quantified a vertical region between 400 K and 550 K. Ozone destruction was observed from mid February to March most these levels, with maximum 25 45ppbv/day. The averaged accumulated vertically integrated smaller than previous two winters, indicating that record low columns spring were partly caused by dynamical effects. inhomogeneous...
Column‐averaged volume mixing ratios of CO 2 have been obtained by ground based high‐resolution solar absorption spectrometry at Ny‐Alesund (Spitsbergen, 79°N) in 2002–2003 and during two ship cruises (54°N–34°S) on the Atlantic 2003. Precisions are better than 0.4% 0.6% for cruises. The observed 11 ppmv (part per million volume) seasonal amplitude column is about 5 smaller surface situ data 2–4 greater model‐predictions. latitudinal gradient inferred from shipborne measurements less Oct/Nov...
Carbon monoxide (CO) volume mixing ratio (VMR) profiles have been retrieved from ship‐borne solar absorption spectra recorded in the Atlantic between 80°N and 70°S. CO can be up to 30 km with a maximum altitude resolution of 4 for few layers. enhancements due biomass burning detected. Recurring were detected upper troposphere (10–15 km) equatorial regions southern (20°S–30°S). These could traced back African sources as well far South America. Similar results are observed measurements space...
Abstract. CO, CH4, N2O and CO2 were retrieved from high resolution solar absorption spectra obtained during a ship cruise Capetown to Bremerhaven in January/February 2003 by Fourier Transform Infrared (FTIR) spectroscopy. Precisions of better than 0.5% for the column averaged volume mixing ratios (VMR) CH4 are achieved using O2 as reference gas. Shipborne FTIR-measurements CO data SCIAMACHY/ENVISAT Weighting Function Modified Differential Optical Absorption Spectroscopy (WFM-DOAS) retrieval...