A5048215016- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Ionosphere and magnetosphere dynamics
- Spectroscopy and Laser Applications
- COVID-19 impact on air quality
- Climate variability and models
- Ocean Acidification Effects and Responses
- Solar and Space Plasma Dynamics
- Impact of Light on Environment and Health
- Water Quality Monitoring and Analysis
- Astro and Planetary Science
- Aerospace Engineering and Energy Systems
- Geomagnetism and Paleomagnetism Studies
- Air Quality and Health Impacts
- Gas Sensing Nanomaterials and Sensors
- Flow Measurement and Analysis
- Urban Heat Island Mitigation
- Genetic factors in colorectal cancer
- Methane Hydrates and Related Phenomena
- Experimental and Theoretical Physics Studies
- Geophysics and Gravity Measurements
- Earthquake Detection and Analysis
- Oceanographic and Atmospheric Processes
Environment and Climate Change Canada
2010-2024
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2020
German Meteorological Service
2020
University of Ibadan
1965
General Electric (Israel)
1949
Since 1996, quality assurance experiments of electrochemical concentration cell (ECC) ozonesondes two different model types (SPC‐6A and ENSCI‐Z) have been conducted in the environmental simulation facility at Research Centre Juelich within framework Ozone Sonde Intercomparison Experiment (JOSIE). The shown that performance characteristics ECC‐sonde can be significantly different, even when operated under same conditions. Particularly above 20 km ENSCI‐Z sonde tends to measure 5–10% more...
Abstract Throughout spring and summer 2020, ozone stations in the northern extratropics recorded unusually low free troposphere. From April to August, from 1 8 kilometers altitude, was on average 7% (≈4 nmol/mol) below 2000–2020 climatological mean. Such ozone, over several months, at so many stations, has not been observed any previous year since least 2000. Atmospheric composition analyses Copernicus Atmosphere Monitoring Service simulations NASA GMI model indicate that large 2020...
Polar Ozone and Aerosol Measurement (POAM) III, a follow‐on to the successful POAM II, is spaceborne experiment designed measure vertical profiles of ozone, water vapor, nitrogen dioxide, aerosol extinction in polar stratosphere upper troposphere with resolution 1–2 km. Measurements are made by solar occultation technique. now orbit aboard SPOT 4 satellite, providing data on north‐ south‐polar ozone phenomena, including hole, spatial temporal variability stratospheric aerosols, clouds,...
The Arctic polar vortex exhibited widespread regions of low temperatures during the winter 2005, resulting in significant ozone depletion by chlorine and bromine species. We show that chemical loss column (ΔO 3 ) volume air cold enough to support existence stratospheric clouds (V PSC both exceed levels found for any other past 40 years. Cold conditions lowermost stratosphere (e.g., between potential 360 400 K) were particularly unusual compared previous Measurements indicate ΔO = 121 ± 20 DU...
A balloon flight to compare 18 ozonesondes with an ozone photometer and column measurements from Dobson Brewer spectrophotometers was completed in April 2004. The core experiment consisted of 12 electrochemical concentration cell ozonesondes, 6 Science Pump Corporation (SP) ENSCI (ES), prepared cathode solution concentrations 0.5% KI (half buffer) 1.0% (full buffer). Auxiliary two sondes 2.0% (no buffer), reconditioned sondes, Japanese‐KC96 sondes. Precision each group similarly <2–3%....
We present validation studies of MLS version 2.2 upper tropospheric and stratospheric ozone profiles using ozonesonde lidar data as well climatological data. Ozone measurements from over 60 stations worldwide three are compared with coincident The between 150 3 hPa agree measurements, within 8% for the global average. values at 215 biased high to ozonesondes by ∼20% middle latitude, although there is a lot variability in this altitude region. Comparisons ground‐based Mauna Loa, Hawaii, Table...
Abstract. This paper presents extensive {bias determination} analyses of ozone observations from the Atmospheric Chemistry Experiment (ACE) satellite instruments: ACE Fourier Transform Spectrometer (ACE-FTS) and Measurement Aerosol Extinction in Stratosphere Troposphere Retrieved by Occultation (ACE-MAESTRO) instrument. Here we compare latest data products ACE-FTS ACE-MAESTRO with coincident nearly 20 satellite-borne, airborne, balloon-borne ground-based instruments, analysing volume mixing...
We assess the impact of transport pollution from midlatitudes on abundance ozone in Arctic summer 2006 using GEOS‐Chem global chemical model and its adjoint. find that although midlatitude emissions abundances is at a maximum fall winter, July North America, Asia, Europe together contributed about 25% surface Arctic. Throughout summer, dominant source troposphere was photochemical production within Arctic, which accounted for more than 50% boundary layer as much 30%–40% middle troposphere....
Abstract We review the current state of knowledge ozonesonde uncertainty and bias, with reference to recent developments in laboratory field experiments. In past 20 years precision has improved by a factor 2, primarily through adoption strict standard operating procedures. The budget for ozone partial pressure reading contributions from stoichiometry, cell background current, pump efficiency temperature, sensing solution type, volume. Corrections historical data known issues may reduce...
Abstract. The TROPOspheric Monitoring Instrument (TROPOMI) aboard the Sentinel-5 Precursor satellite (launched on 13 October 2017) is a nadir-viewing spectrometer measuring reflected sunlight in ultraviolet, visible, near-infrared, and shortwave infrared spectral ranges. measured spectra are used to retrieve total columns of trace gases, including nitrogen dioxide (NO2). For ground validation these measurements, Pandora spectrometers, which high-quality NO2 via direct-sun widely used. In...
Abstract An international effort to improve ozonesonde data quality and reevaluate historical records has made significant improvements in the accuracy of global network data. However, between 2014 2016, total column ozone (TCO; O 3 ) at 14 37 regularly reporting stations exhibited a sudden dropoff relative satellite measurements. The TCO drop is 3–7% compared ground‐based TCO, 5–10% or more stratospheric profiles, compromising use recent for trends, although they remain reliable other uses....
Abstract The ozonesonde is a small balloon-borne instrument that attached to standard radiosonde measure profiles of ozone from the surface 35 km with ∼100-m vertical resolution. Ozonesonde data constitute mainstay satellite calibration and are used for climatologies analysis trends, especially in lower stratosphere where satellites most uncertain. electrochemical concentration cell (ECC) has been deployed at ∼100 stations worldwide since 1960s, changes over time manufacture procedures,...
Abstract The recent Assessment of Standard Operating Procedures for Ozonesondes 2.0 (WMO/GAW Report #268) addressed questions homogeneity and long‐term stability in global electrochemical concentration cell (ECC) ozone sounding network time series. Among its recommendations was adoption a standard evaluating data quality ozonesonde Total column (TCO) derived from the sondes compared to TCO Aura's Ozone Monitoring Instrument (OMI) is primary indicator. Comparisons sonde with Microwave Limb...
We estimate the tropospheric column ozone using a forward trajectory model to increase horizontal resolution of Aura Microwave Limb Sounder (MLS) derived stratospheric ozone. Subtracting MLS from Ozone Monitoring Instrument total measurements gives enhanced residual (TTOR). Because different tropopause definitions, we validate basic technique by computing 200‐hPa‐to‐surface and comparing it same product ozonesondes Tropospheric Emission Spectrometer measurements. Comparisons show good...
Abstract. In Canada routine ozone soundings have been carried at Resolute Bay since 1966, making this record the longest in world. Similar measurements started 1970s three other sites, and network was expanded stages to 10 sites by 2003. This important for understanding long-term changes tropospheric stratospheric has re-evaluated as part of SPARC/IO3C/IGACO-O3/NDACC (SI2N) initiative. The Brewer–Mast sonde, used Canadian until 1980, is different construction from electrochemical...
Measurements of the vertical profile ozone concentration using balloon‐borne ECC ozonesondes have been made weekly since 1980 at several sites in Canada (Edmonton, Goose Bay, Churchill, and Resolute), 1987 Alert, 1992 Eureka. Previous analyses trends over shown strong negative tropospheric ozone. We present here a new analysis distribution with data up to end 2001. In addition, more detailed attention is paid some potential sources bias: total correction, background current time‐of‐launch...
Abstract. A multi-model study of the long-range transport ozone and its precursors from major anthropogenic source regions was coordinated by Task Force on Hemispheric Transport Air Pollution (TF HTAP) under Convention Long-range Transboundary (LRTAP). Vertical profiles at 12-h intervals 2001 are available twelve models contributing to this compared here with observed ozonesondes. The contributions each region analysed for selected sondes, analysis is supplemented retroplume calculations...
Abstract The winter 2019/2020 showed the lowest ozone mixing ratios ever observed in Arctic stratosphere. It was coldest stratospheric on record and characterized by an unusually strong long‐lasting polar vortex. We study chemical evolution depletion using global Chemistry Transport Model ATLAS. examine whether processes are more characteristic of typical conditions Antarctic winters or average winters. runs for compared to simulations 2004/2005, 2009/2010, 2010/2011 2006 2011, assess...
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...
Field determinations of surface emissivity and temperature were carried out at the western end Lake Ontario between July November 1969. Emissivity was obtained from infrared thermometer measurements using an aluminum cone. Surface measured directly with floating thermistors estimated outgoing longwave radiation. constant 0.972 no detectable variation water turbidity chemical content changes. Float temperatures in good agreement times when there sensor problems. Temperatures calculated...
A spectrophotometer was used to determine surface emissivity of water samples in a laboratory. The results confirm previous field result that is independent composition and approximately equal 0.97. This value reduced by about 3% the presence oil films but effect different types negligible.
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Science. 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]An Examination of Recent Stability Ozonesonde Global Network DataAuthorsRyan MichaelStaufferiDAnne M.ThompsoniDDebraKollonigeDavidTarasickRoelandVan MaldereniDHerman...