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Faculty of Science, Medicine and Health - Papers: part A

Measurements

Articles 1 - 19 of 19

Full-Text Articles in Social and Behavioral Sciences

Comparisons Of The Orbiting Carbon Observatory-2 (Oco-2) XCo2 Measurements With Tccon, Debra Wunch, Paul O. Wennberg, Greg Osterman, B Fisher, Bret Naylor, Coleen M. Roehl, Christopher O'Dell, L Mandrake, C Viatte, Matthaus Kiel, David W. T Griffith, Nicholas M. Deutscher, Voltaire A. Velazco Jan 2017

Comparisons Of The Orbiting Carbon Observatory-2 (Oco-2) XCo2 Measurements With Tccon, Debra Wunch, Paul O. Wennberg, Greg Osterman, B Fisher, Bret Naylor, Coleen M. Roehl, Christopher O'Dell, L Mandrake, C Viatte, Matthaus Kiel, David W. T Griffith, Nicholas M. Deutscher, Voltaire A. Velazco

Faculty of Science, Medicine and Health - Papers: part A

NASA's Orbiting Carbon Observatory-2 (OCO-2) has been measuring carbon dioxide column-averaged dry-air mole fraction, XCO2, in the Earth's atmosphere for over 2 years. In this paper, we describe the comparisons between the first major release of the OCO-2 retrieval algorithm (B7r) and XCO2 from OCO-2's primary ground-based validation network: the Total Carbon Column Observing Network (TCCON). The OCO-2 XCO2 retrievals, after filtering and bias correction, agree well when aggregated around and coincident with TCCON data in nadir, glint, and target observation modes, with absolute median differences less than 0.4 ppm and RMS differences ...


Field Measurements Of Trace Gases Emitted By Prescribed Fires In Southeastern Us Pine Forests Using An Open-Path Ftir System, S K. Akagi, I R. Burling, A Mendoza, T J. Johnson, M Cameron, D W. T Griffith, C Paton-Walsh, D R. Weise, J Reardon, R J. Yokelson Jan 2014

Field Measurements Of Trace Gases Emitted By Prescribed Fires In Southeastern Us Pine Forests Using An Open-Path Ftir System, S K. Akagi, I R. Burling, A Mendoza, T J. Johnson, M Cameron, D W. T Griffith, C Paton-Walsh, D R. Weise, J Reardon, R J. Yokelson

Faculty of Science, Medicine and Health - Papers: part A

We report trace-gas emission factors from three pine-understory prescribed fires in South Carolina, US measured during the fall of 2011. The fires were more intense than many prescribed burns because the fuels included mature pine stands not subjected to prescribed fire in decades that were lit following an extended drought. Emission factors were measured with a fixed open-path Fourier transform infrared (OP-FTIR) system that was deployed on the fire control lines. We compare these emission factors to those measured with a roving, point sampling, land-based FTIR and an airborne FTIR deployed on the same fires. We also compare to emission ...


Measurements Of Co, Hcn, And C2h6 Total Columns In Smoke Plumes Transported From The 2010 Russian Boreal Forest Fires To The Canadian High Arctic, C Viatte, K Strong, C Paton-Walsh, J Mendonca, N T. O'Neill, J R. Drummond Jan 2013

Measurements Of Co, Hcn, And C2h6 Total Columns In Smoke Plumes Transported From The 2010 Russian Boreal Forest Fires To The Canadian High Arctic, C Viatte, K Strong, C Paton-Walsh, J Mendonca, N T. O'Neill, J R. Drummond

Faculty of Science, Medicine and Health - Papers: part A

In August 2010, simultaneous enhancements of aerosol optical depth and total columns of carbon monoxide (CO), hydrogen cyanide (HCN), and ethane (C2H6) were observed at the Polar Environment Atmospheric Research Laboratory (PEARL, 80.05°N, −86.42°W, 0.61 km above sea level, Eureka, Nunavut, Canada). Moderate Resolution Imaging Spectroradiometer (MODIS) hot spots, Ozone Monitoring Instrument (OMI) aerosol index maps, and Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) back-trajectories were used to attribute these enhancements to an intense boreal fire event occurring in Russia. A ground-based Fourier Transform InfraRed (FTIR) spectrometer at PEARL provided vertically integrated measurements of trace ...


Hox Measurements In The Summertime Upper Troposphere Over Europe: A Comparison Of Observations To A Box Model And A 3-D Model, E Regelin, H Harder, M Martinez, D Kubistin, C Tatum Ernest, H Bozem, T Klippel, Z Hosaynali-Beygi, H Fischer, R Sander, P Jockel, R Konigstedt, J Lelieveld Jan 2013

Hox Measurements In The Summertime Upper Troposphere Over Europe: A Comparison Of Observations To A Box Model And A 3-D Model, E Regelin, H Harder, M Martinez, D Kubistin, C Tatum Ernest, H Bozem, T Klippel, Z Hosaynali-Beygi, H Fischer, R Sander, P Jockel, R Konigstedt, J Lelieveld

Faculty of Science, Medicine and Health - Papers: part A

In situ airborne measurements of OH and HO2 with the HORUS (HydrOxyl Radical measurement Unit based on fluorescence Spectroscopy) instrument were performed in the summertime upper troposphere across Europe during the HOOVER 2 (HOx OVer EuRope) campaign in July 2007. Complementary measurements of trace gas species and photolysis frequencies were conducted to obtain a broad data set, which has been used to quantify the significant HOx sources and sinks. In this study we compare the in situ measurement of OH and HO2 with simulated mixing ratios from the constrained box model CAABA/MECCA (Chemistry As A Box Model Application/Module ...


Measurements Of Reactive Trace Gases And Variable O3 Formation Rates In Some South Carolina Biomass Burning Plumes, S K. Akagi, Robert J. Yokelson, I R. Burling, S Meinardi, I Simpson, D R. Blake, G R. Mcmeeking, A Sullivan, T Lee, S Kreidenweis, S Urbanski, J Reardon, D W.T Griffith, T J. Johnson, D R. Weise Jan 2013

Measurements Of Reactive Trace Gases And Variable O3 Formation Rates In Some South Carolina Biomass Burning Plumes, S K. Akagi, Robert J. Yokelson, I R. Burling, S Meinardi, I Simpson, D R. Blake, G R. Mcmeeking, A Sullivan, T Lee, S Kreidenweis, S Urbanski, J Reardon, D W.T Griffith, T J. Johnson, D R. Weise

Faculty of Science, Medicine and Health - Papers: part A

In October–November 2011 we measured trace gas emission factors from seven prescribed fires in South Carolina (SC), US, using two Fourier transform infrared spectrometer (FTIR) systems and whole air sampling (WAS) into canisters followed by gas-chromatographic analysis. A total of 97 trace gas species were quantified from both airborne and ground-based sampling platforms, making this one of the most detailed field studies of fire emissions to date. The measurements include the first emission factors for a suite of monoterpenes produced by heating vegetative fuels during field fires. The first quantitative FTIR observations of limonene in smoke are reported along ...


Coupling Field And Laboratory Measurements To Estimate The Emission Factors Of Identified And Unidentified Trace Gases For Prescribed Fires, R Yokelson, I Burling, J Gilman, C Warneke, C Stockwell, J De Gouw, S Akagi, S Urbanski, P Veres, J M. Roberts, W C. Kuster, J Reardon, D W.T Griffith, T J. Johnson, S Hosseini, J W. Miller, D Cocker, H Jung, D R. Weise Jan 2013

Coupling Field And Laboratory Measurements To Estimate The Emission Factors Of Identified And Unidentified Trace Gases For Prescribed Fires, R Yokelson, I Burling, J Gilman, C Warneke, C Stockwell, J De Gouw, S Akagi, S Urbanski, P Veres, J M. Roberts, W C. Kuster, J Reardon, D W.T Griffith, T J. Johnson, S Hosseini, J W. Miller, D Cocker, H Jung, D R. Weise

Faculty of Science, Medicine and Health - Papers: part A

An extensive program of experiments focused on biomass burning emissions began with a laboratory phase in which vegetative fuels commonly consumed in prescribed fires were collected in the southeastern and southwestern US and burned in a series of 71 fires at the US Forest Service Fire Sciences Laboratory in Missoula, Montana. The particulate matter (PM2.5) emissions were measured by gravimetric filter sampling with subsequent analysis for elemental carbon (EC), organic carbon (OC), and 38 elements. The trace gas emissions were measured by an open-path Fourier transform infrared (OP-FTIR) spectrometer, proton-transfer-reaction mass spectrometry (PTR-MS), proton-transfer ion-trap mass spectrometry (PIT-MS), negative-ion ...


Simultaneous Retrieval Of Atmospheric Co2 And Light Path Modification From Space-Based Spectroscopic Observations Of Greenhouse Gases: Methodology And Application To Gosat Measurements Over Tccon Sites, Sergey Oshchepkov, Andrey Bril, Tatsuya Yokota, Yukio Yoshida, Thomas Blumenstock, Nicholas M. Deutscher, Susanne Dohe, Ronald Macatangay, Isamu Morino, Justus Notholt, Markus Rettinger, Christof Petri, Matthias Schneider, Ralf Sussmann, Osamu Uchino, Voltaire A. Velazco, Debra Wunch, Dmitry Belikov Jan 2013

Simultaneous Retrieval Of Atmospheric Co2 And Light Path Modification From Space-Based Spectroscopic Observations Of Greenhouse Gases: Methodology And Application To Gosat Measurements Over Tccon Sites, Sergey Oshchepkov, Andrey Bril, Tatsuya Yokota, Yukio Yoshida, Thomas Blumenstock, Nicholas M. Deutscher, Susanne Dohe, Ronald Macatangay, Isamu Morino, Justus Notholt, Markus Rettinger, Christof Petri, Matthias Schneider, Ralf Sussmann, Osamu Uchino, Voltaire A. Velazco, Debra Wunch, Dmitry Belikov

Faculty of Science, Medicine and Health - Papers: part A

This paper presents an improved photon path length probability density function method that permits simultaneous retrievals of column-average greenhouse gas mole fractions and light path modifications through the atmosphere when processing high-resolution radiance spectra acquired from space. We primarily describe the methodology and retrieval setup and then apply them to the processing of spectra measured by the Greenhouse gases Observing SATellite (GOSAT). We have demonstrated substantial improvements of the data processing with simultaneous carbon dioxide and light path retrievals and reasonable agreement of the satellite-based retrievals against ground-based Fourier transform spectrometer measurements provided by the Total Carbon Column Observing Network ...


Improved Water Vapour Spectroscopy In The 4174-4300 Cm(-1) Region And Its Impact On Sciamachy Hdo/H2o Measurements, R A. Scheepmaker, C Frankenberg, A Galli, A Butz, H Schrijver, N M. Deutscher, D Wunch, T Warneke, S Fally, I Aben Jan 2013

Improved Water Vapour Spectroscopy In The 4174-4300 Cm(-1) Region And Its Impact On Sciamachy Hdo/H2o Measurements, R A. Scheepmaker, C Frankenberg, A Galli, A Butz, H Schrijver, N M. Deutscher, D Wunch, T Warneke, S Fally, I Aben

Faculty of Science, Medicine and Health - Papers: part A

The relative abundance of the heavy water isotopologue HDO provides a deeper insight into the atmospheric hydrological cycle. The SCanning Imaging Absorption spectroMeter for Atmospheric CartograpHY (SCIAMACHY) allows for global retrievals of the ratio HDO/H2O in the 2.3 micron wavelength range. However, the spectroscopy of water lines in this region remains a large source of uncertainty for these retrievals. We therefore evaluate and improve the water spectroscopy in the range 4174-4300 cm(-1) and test if this reduces systematic uncertainties in the SCIAMACHY retrievals of HDO/H2O. We use a laboratory spectrum of water vapour to fit line ...


Impact Of Aerosol And Thin Cirrus On Retrieving And Validating Xco2 From Gosat Shortwave Infrared Measurements, S Guerlet, A Butz, D Schepers, S Basu, O Hasekamp, A Kuze, T Yokota, J.-F Blavier, N M. Deutscher, D W.T Griffith, F Hase, E Kyro, I Morino, V Sherlock, R Sussmann, A Galli, I Aben Jan 2013

Impact Of Aerosol And Thin Cirrus On Retrieving And Validating Xco2 From Gosat Shortwave Infrared Measurements, S Guerlet, A Butz, D Schepers, S Basu, O Hasekamp, A Kuze, T Yokota, J.-F Blavier, N M. Deutscher, D W.T Griffith, F Hase, E Kyro, I Morino, V Sherlock, R Sussmann, A Galli, I Aben

Faculty of Science, Medicine and Health - Papers: part A

Inadequate treatment of aerosol scattering can be a significant source of error when retrieving column-averaged dry-air mole fractions of CO2 (XCO2) from space-based measurements of backscattered solar shortwave radiation. We have developed a retrieval algorithm, RemoTeC, that retrieves three aerosol parameters (amount, size, and height) simultaneously with XCO2. Here we evaluate the ability of RemoTeC to account for light path modifications by clouds, subvisual cirrus, and aerosols when retrieving XCO2 from Greenhouse Gases Observing Satellite (GOSAT) Thermal and Near-infrared Sensor for carbon Observation (TANSO)-Fourier Transform Spectrometer (FTS) measurements. We first evaluate a cloud filter based on measurements from the ...


Interlaboratory Study For Coral Sr/Ca And Other Element/Ca Ratio Measurements, Ed C. Hathorne, Alex Gagnon, Thomas Felis, Jess Adkins, Ryuji Asami, Wim Boer, Nicolas Caillon, David Case, Kim M. Cobb, Eric Douville, Peter Demenocal, Anton Eisenhauer, Dieter Garbe-Schonberg, Walter Geibert, Steven Goldstein, Konrad Hughen, Mayuri Inoue, Hodaka Kawahata, Martin Kolling, Florence L. Cornec, Braddock K. Linsley, Helen V. Mcgregor, Paolo Montagna, Intan S. Nurhati, Terrence M. Quinn, Jacek Raddatz, Helene Rebaubier, Laura Robinson, Aleksey Sadekov, Robert Sherrell, Dan Sinclair, Alexander W. Tudhope, Gangjian Wei, Henri Wong, Henry C. Wu, Chen-Feng You Jan 2013

Interlaboratory Study For Coral Sr/Ca And Other Element/Ca Ratio Measurements, Ed C. Hathorne, Alex Gagnon, Thomas Felis, Jess Adkins, Ryuji Asami, Wim Boer, Nicolas Caillon, David Case, Kim M. Cobb, Eric Douville, Peter Demenocal, Anton Eisenhauer, Dieter Garbe-Schonberg, Walter Geibert, Steven Goldstein, Konrad Hughen, Mayuri Inoue, Hodaka Kawahata, Martin Kolling, Florence L. Cornec, Braddock K. Linsley, Helen V. Mcgregor, Paolo Montagna, Intan S. Nurhati, Terrence M. Quinn, Jacek Raddatz, Helene Rebaubier, Laura Robinson, Aleksey Sadekov, Robert Sherrell, Dan Sinclair, Alexander W. Tudhope, Gangjian Wei, Henri Wong, Henry C. Wu, Chen-Feng You

Faculty of Science, Medicine and Health - Papers: part A

The Sr/Ca ratio of coral aragonite is used to reconstruct past sea surface temperature (SST). Twenty-one laboratories took part in an interlaboratory study of coral Sr/Ca measurements. Results show interlaboratory bias can be significant, and in the extreme case could result in a range in SST estimates of 7°C. However, most of the data fall within a narrower range and the Porites coral reference material JCp-1 is now characterized well enough to have a certified Sr/Ca value of 8.838 mmol/mol with an expanded uncertainty of 0.089 mmol/mol following International Association of Geoanalysts ...


Infrared Stimulated Luminescence Measurements Of Single Grains Of K-Rich Feldspar For Isochron Dating, Bo Li, Sheng-Hua Li, Geoffrey A. T Duller, Ann G. Wintle Jan 2011

Infrared Stimulated Luminescence Measurements Of Single Grains Of K-Rich Feldspar For Isochron Dating, Bo Li, Sheng-Hua Li, Geoffrey A. T Duller, Ann G. Wintle

Faculty of Science, Medicine and Health - Papers: part A

This paper explores the use of single grain luminescence measurements in isochron dating of K-rich feldspars. The thermal stability of individual feldspar grains was investigated using pulse annealing methods, which appears to distinguish between K-rich and Na-rich feldspars. A good isochron fit was obtained using synthetic aliquots produced from the single grain data set and the age obtained based on an assumed K content of 13 ± 1% was in good agreement with that obtained using single aliquot measurements (and with other age control).


Anomalous Fading: A Reply To The Comment By Huntley On "Isochron Measurements Of Naturally Irradiated K-Feldspar Grains", Bo Li, Sheng-Hua Li, Ann G. Wintle, Hui Zhao Jan 2011

Anomalous Fading: A Reply To The Comment By Huntley On "Isochron Measurements Of Naturally Irradiated K-Feldspar Grains", Bo Li, Sheng-Hua Li, Ann G. Wintle, Hui Zhao

Faculty of Science, Medicine and Health - Papers: part A

We are pleased that Huntley (this issue) has put forward another explanation for the data that we obtained when we measured the equivalent doses (De) of potassium (K) feldspar grains of different diameters using their infrared stimulated luminescence (IRSL) signals (Li et al., 2007). We also measured the fading rates for the IRSL signals from grains of different size and concluded that the fading rates were independent of grain size. Huntley is concerned that the fading rates (g-values) that we obtained had relatively large errors and that these could have masked any minor differences in the g-values; a small systematic ...


Quantitative Characterization Of Emissions From Biomass Burning Using Remote Sensing Measurements, Clare Paton-Walsh, Emma Young, David Griffith Jan 2011

Quantitative Characterization Of Emissions From Biomass Burning Using Remote Sensing Measurements, Clare Paton-Walsh, Emma Young, David Griffith

Faculty of Science, Medicine and Health - Papers: part A

We present a new method for deriving total emissions estimates from large vegetation fires using satellite-based measurements of aerosol optical depth. This method is based upon simultaneous measurements of total column amounts of trace gases and aerosol optical depth of the atmosphere through smoke plumes from Australian fires. These measurements were derived from ground-based solar remote sensing spectrometers in the infrared and UV-visible spectral regions and also provide emission ratios that may be used in more conventional bottom-up estimates of total emissions. Measurements of emissions from Australian forest fires are relatively sparse given the significance of this source to the ...


Intercomparison Of Ndsc Ground-Based Solar Ftir Measurements Of Atmospheric Gases At Lauder, New Zealand, D W. T Griffith, Nicholas Jones, B Mcnamara, Clare Paton-Walsh, W. R. Bell, Cirilo Bernado Jan 2003

Intercomparison Of Ndsc Ground-Based Solar Ftir Measurements Of Atmospheric Gases At Lauder, New Zealand, D W. T Griffith, Nicholas Jones, B Mcnamara, Clare Paton-Walsh, W. R. Bell, Cirilo Bernado

Faculty of Science, Medicine and Health - Papers: part A

A formal intercomparison of atmospheric total column measurements of N2O, N2, CH4, O3, HCl, HNO3, and HF by two ground-based solar Fourier transform infrared (FTIR) spectrometers conducted as part of the Network for the Detection of Stratospheric Change (NDSC) instrument certification procedure at Lauder, New Zealand, is presented. The two instruments were nominally very similar, collocated, and collected data at the same times. Collected spectra were analyzed independently by the individual operators in a blind-phase intercomparison, then reanalyzed by a single operator using identical analysis methods to eliminate any potential bias from the spectral ...


Validation Of Version 5.20 Ilas Hno3, Ch4, N2o, O3, And No2 Using Ground-Based Measurements At Arrival Heights And Kiruna, S W. Wood, G E. Bodeker, I S. Boyd, Nicholas Jones, B J. Connor, P V. Johnston, W A. Matthews, S E. Nichol, F J. Murcray, H Nakajima, Y Sasano Jan 2002

Validation Of Version 5.20 Ilas Hno3, Ch4, N2o, O3, And No2 Using Ground-Based Measurements At Arrival Heights And Kiruna, S W. Wood, G E. Bodeker, I S. Boyd, Nicholas Jones, B J. Connor, P V. Johnston, W A. Matthews, S E. Nichol, F J. Murcray, H Nakajima, Y Sasano

Faculty of Science, Medicine and Health - Papers: part A

Ground-based measurements of O3 and NO2 columns at Kiruna (68°N) and Arrival Heights (78°S) were used to validate stratospheric profile measurements of the same species by the satellite-based Improved Limb Atmospheric Spectrometer (ILAS) flown between November 1996 and June 1997. In addition, measurements of HNO3, CH4, and N2O made at Arrival Heights are compared with measurements of these species by ILAS. Even though there were no temporal coincidences in the latter comparison, the ground-based data provide a climatological context for the ILAS measurements. ILAS profiles measured within 10° of longitude and 2 ...


Multiyear Infrared Solar Spectroscopic Measurements Of Hcn, Co, C2h6, And C2h2 Tropospheric Columns Above Lauder, New Zealand (45 S Latitude), C P. Rinsland, Nicholas Jones, Brian J. Connor, Stephen W. Wood, Aaron Goldman, Thomas M. Stephen, Frank J. Murcray, Linda S. Chiou, Rodolphe Zander, Emmanuel Mahieu Jan 2002

Multiyear Infrared Solar Spectroscopic Measurements Of Hcn, Co, C2h6, And C2h2 Tropospheric Columns Above Lauder, New Zealand (45 S Latitude), C P. Rinsland, Nicholas Jones, Brian J. Connor, Stephen W. Wood, Aaron Goldman, Thomas M. Stephen, Frank J. Murcray, Linda S. Chiou, Rodolphe Zander, Emmanuel Mahieu

Faculty of Science, Medicine and Health - Papers: part A

Near-simultaneous, 0.0035 or 0.007 cm−1 resolution infrared solar absorption spectra of tropospheric HCN, C2H2, CO, and C2H6 have been recorded from the Network for the Detection of Stratospheric Change station in Lauder, New Zealand (45.04°S, 169.68°E, 0.37 km altitude). All four molecules were measured on over 350 days with HCN and C2H2 reported for the first time based on a new analysis procedure that significantly increases the effective signal-to-noise of weak tropospheric absorption features in the measured spectra. The CO measurements extend by ...


Ground-Based Infrared Spectroscopic Measurements Of Carbonyl Sulfide: Free Tropospheric Trends From A 24-Year Time Series Of Solar Absorption Measurements, C P. Rinsland, A Goldman, E Mahieu, R Zander, J Notholt, Nicholas Jones, D W. T Griffith, T M. Stephen, L S. Chiou Jan 2002

Ground-Based Infrared Spectroscopic Measurements Of Carbonyl Sulfide: Free Tropospheric Trends From A 24-Year Time Series Of Solar Absorption Measurements, C P. Rinsland, A Goldman, E Mahieu, R Zander, J Notholt, Nicholas Jones, D W. T Griffith, T M. Stephen, L S. Chiou

Faculty of Science, Medicine and Health - Papers: part A

Solar absorption spectra recorded over a 24-year time span have been analyzed to retrieve average free tropospheric mixing ratios of carbonyl sulfide (OCS). The measurements were recorded with the Fourier transform spectrometer located in the U.S. National Solar Observatory McMath solar telescope facility on Kitt Peak (altitude 2.09 km, lat. 31.9°N, long. 111.6°W), southwest of Tucson, Arizona, and were obtained on 167 days between May 1978 and February 2002, typically at 0.01-cm−1 spectral resolution. A best fit to the time series shows an average mixing ratio of 566 pptv (1 pptv = 10 ...


Ground-Based Measurements Of Tropospheric Co, C2h6, And Hcn From Australia At 34 S Latitude During 1997-1998, Curtis P. Rinsland, Arndt Meier, D W T Griffith, Linda S. Chiou Jan 2001

Ground-Based Measurements Of Tropospheric Co, C2h6, And Hcn From Australia At 34 S Latitude During 1997-1998, Curtis P. Rinsland, Arndt Meier, D W T Griffith, Linda S. Chiou

Faculty of Science, Medicine and Health - Papers: part A

High spectral resolution (0.004 cm−1) infrared solar absorption measurements of CO, C2H6, and HCN have been recorded with the Fourier transform spectrometer located at the Network for the Detection of Stratospheric Change complementary station at the University of Wollongong, Australia (34.45°S, 150.88°E, 30 m above sea level). The time series covers March 1997 to February 1998. Profile retrievals with maximum sensitivity in the upper troposphere show distinct seasonal cycles for all three molecules with maxima during October-December 1997. Best fits to the time series of daily averages yield peak 0.03 ...


Mesospheric Temperatures From Observations Of The Hydroxyl (6-2) Emission Above Davis, Antarctica: A Comparison Of Rotational And Doppler Measurements, J L. Innis, Frances Phillips, G B. Burns, P A. Greet, W J R French, P L. Dyson Jan 2001

Mesospheric Temperatures From Observations Of The Hydroxyl (6-2) Emission Above Davis, Antarctica: A Comparison Of Rotational And Doppler Measurements, J L. Innis, Frances Phillips, G B. Burns, P A. Greet, W J R French, P L. Dyson

Faculty of Science, Medicine and Health - Papers: part A

We present observations of the hydroxyl (6–2) airglow lines from ~ 87 km altitude obtained at Davis station, Antarctica, in the austral winter of 1999. Nine nights of observations were made of the P-branch near λ840 nm with a Czerny-Turner scanning spectrometer (CTS); at the same time, high-resolution Fabry-Perot Spectrometer (FPS) spectra were collected of the Q1(1) doublet at λ834 nm. Rotational temperatures were determined from the CTS observations, while Doppler temperatures were derived from the line-widths of the FPS Q1(1) spectra. Absolute temperatures determined by these methods are uncertain by ~ 2 and ~ 20 K, respectively ...