Tropospheric water vapour isotopologue data (H&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;&amp;lt;sup&amp;gt;16&amp;lt;/sup&amp;gt;O,  H&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;&amp;lt;sup&amp;gt;18&amp;lt;/sup&amp;gt;O, and  HD&amp;lt;sup&amp;gt;16&amp;lt;/sup&amp;gt;O) as obtained from NDACC/FTIR solar absorption spectra

Barthlott, Sabine; Schneider, Mat­thias; Hase, Frank; Blumenstock, Thomas; Kiel, Matthäus; Dubravica, Darko; García, Omaira; Sepúlveda, Eliezer; Tsidu, Gizaw Mengistu; Kenea, Samuel Takele; Grütter, Michel; Plaza-Medina, Eddy F.; Stremme, Wolfgang; Strong, Kimberly; Weaver, Dan; Palm, Mathias; Warneke, Thorsten; Notholt, Justus; Mahieu, Emmanuel; Servais, Christian; Jones, Nicholas; Griffith, David; Smale, Dan; Robinson, John

doi:10.5194/essd-9-15-2017

Cited by 39 publications

(43 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Instruments along the x axis (top) are X while instruments along the y axis (side) are Y in Eqs. (1) and (2). A high-resolution version of this table can be found in Table S2.…”

Section: Pal To Ridge Lab Partial Column Comparisonsmentioning

confidence: 99%

Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site

Weaver¹,

Strong²,

Schneider³

et al. 2017

Atmos. Meas. Tech.

Self Cite

View full text Add to dashboard Cite

Abstract. Water vapour is a critical component of the Earth system. Techniques to acquire and improve measurements of atmospheric water vapour and its isotopes are under active development. This work presents a detailed intercomparison of water vapour total column measurements taken between 2006 and 2014 at a Canadian High Arctic research site (Eureka, Nunavut). Instruments include radiosondes, sun photometers, a microwave radiometer, and emission and solar absorption Fourier transform infrared (FTIR) spectrometers. Close agreement is observed between all combination of datasets, with mean differences ≤ 1.0 kg m −2 and correlation coefficients ≥ 0.98. The one exception in the observed high correlation is the comparison between the microwave radiometer and a radiosonde product, which had a correlation coefficient of 0.92.A variety of biases affecting Eureka instruments are revealed and discussed. A subset of Eureka radiosonde measurements was processed by the Global Climate Observing System (GCOS) Reference Upper Air Network (GRUAN) for this study. Comparisons reveal a small dry bias in the standard radiosonde measurement water vapour total columns of approximately 4 %. A recently produced solar absorption FTIR spectrometer dataset resulting from the MU-SICA (MUlti-platform remote Sensing of Isotopologues for investigating the Cycle of Atmospheric water) retrieval technique is shown to offer accurate measurements of water vapour total columns (e.g. average agreement within −5.2 % of GRUAN and −6.5 % of a co-located emission FTIR spectrometer). However, comparisons show a small wet bias of approximately 6 % at the high-latitude Eureka site. In addition, a new dataset derived from Atmospheric Emitted Radiance Interferometer (AERI) measurements is shown to provide accurate water vapour measurements (e.g. average agreement was within 4 % of GRUAN), which usefully enables measurements to be taken during day and night (especially valuable during polar night).

show abstract

“…Instruments along the x axis (top) are X while instruments along the y axis (side) are Y in Eqs. (1) and (2). A high-resolution version of this table can be found in Table S2.…”

Section: Pal To Ridge Lab Partial Column Comparisonsmentioning

confidence: 99%

Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site

Weaver¹,

Strong²,

Schneider³

et al. 2017

Atmos. Meas. Tech.

Self Cite

View full text Add to dashboard Cite

show abstract

“…TES is an FTIR aboard Aura that observes emitted radiance between 650 and 3050 cm −1 spectral resolution of 0.10 cm −1 when observing in nadir mode and 0.025 cm −1 in limbviewing mode (Beer et al, 2001). Limb-scanning measurements were performed only until May 2005.…”

Section: Tesmentioning

confidence: 99%

Comparison of ground-based and satellite measurements of water vapour vertical profiles over Ellesmere Island, Nunavut

et al. 2019

Self Cite

View full text Add to dashboard Cite

Abstract. Improving measurements of water vapour in the upper troposphere and lower stratosphere (UTLS) is a priority for the atmospheric science community. In this work, UTLS water vapour profiles derived from Atmospheric Chemistry Experiment (ACE) satellite measurements are assessed with coincident ground-based measurements taken at a high Arctic observatory at Eureka, Nunavut, Canada. Additional comparisons to satellite measurements taken by the Atmospheric Infrared Sounder (AIRS), Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), Microwave Limb Sounder (MLS), Scanning Imaging Absorption Spectrometer for Atmospheric CHartography (SCIAMACHY), and Tropospheric Emission Spectrometer (TES) are included to put the ACE Fourier transform spectrometer (ACE-FTS) and ACE Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation (ACE-MAESTRO) results in context. Measurements of water vapour profiles at Eureka are made using a Bruker 125HR solar absorption Fourier transform infrared spectrometer at the Polar Environment Atmospheric Research Laboratory (PEARL) and radiosondes launched from the Eureka Weather Station. Radiosonde measurements used in this study were processed with software developed by the Global Climate Observing System (GCOS) Reference Upper-Air Network (GRUAN) to account for known biases and calculate uncertainties in a well-documented and consistent manner. ACE-FTS measurements were within 11 ppmv (parts per million by volume; 13 %) of 125HR measurements between 6 and 14 km. Between 8 and 14 km ACE-FTS profiles showed a small wet bias of approximately 8 % relative to the 125HR. ACE-FTS water vapour profiles had mean differences of 13 ppmv (32 %) or better when compared to coincident radiosonde profiles at altitudes between 6 and 14 km; mean differences were within 6 ppmv (12 %) between 7 and 11 km. ACE-MAESTRO profiles showed a small dry bias relative to the 125HR of approximately 7 % between 6 and 9 km and 10 % between 10 and 14 km. ACE-MAESTRO profiles agreed within 30 ppmv (36 %) of the radiosondes between 7 and 14 km. ACE-FTS and ACE-MAESTRO comparison results show closer agreement with the radiosondes and PEARL 125HR overall than other satellite datasets – except for AIRS. Close agreement was observed between AIRS and the 125HR and radiosonde measurements, with mean differences within 5 % and correlation coefficients above 0.83 in the troposphere between 1 and 7 km. Comparisons to MLS at altitudes around 10 km showed a dry bias, e.g. mean differences between MLS and radiosondes were −25.6 %. SCIAMACHY comparisons were very limited due to minimal overlap between the vertical extent of the measurements. TES had no temporal overlap with the radiosonde dataset used in this study. Comparisons between TES and the 125HR showed a wet bias of approximately 25 % in the UTLS and mean differences within 14 % below 5 km.

show abstract

“…The CANDAC Bruker IFS 125HR is a Fourier transform infrared spectrometer (FTIR) that is part of the Network for the Detection of Atmospheric Composition Change (NDACC, www.ndacc.org). The Bruker 125HR was deployed at the Polar Environmental Atmosphere Research Laboratory (PEARL) Ridge Lab (86.4 • W, 80.1 • N; Fogal et al, 2013) in 2006 (Batchelor et al, 2009). The PEARL Ridge Lab is 610 m above sea level, 15 km away from EWS (which is 10 m above sea level).…”

Section: Water Vapour and Hdo Measurementsmentioning

confidence: 99%

Response to Referee #2

Zhao¹

2017

Preprint

View full text Add to dashboard Cite

Ground-based, satellite, and reanalysis datasets were used to identify two similar cyclone-induced surface ozone depletion events at Eureka, Canada (80.1 • N, 86.4 • W), in March 2007 and April 2011. These two events were coincident with observations of hydrogen deuterium oxide (HDO) depletion, indicating that condensation and sublimation occurred during the transport of the ozonedepleted air masses. Ice clouds (vapour and crystals) and aerosols were detected by lidar and radar when the ozoneand HDO-depleted air masses arrived over Eureka. For the 2007 event, an ice cloud layer was coincident with an aloft ozone depletion layer at 870 m altitude on 2-3 March, indicating this ice cloud layer contained bromine-enriched blowing-snow particles. Over the following 3 days, a shallow surface ozone depletion event (ODE) was observed at Eureka after the precipitation of bromine-enriched particles onto the local snowpack. A chemistry-climate model (UKCA) and a chemical transport model (pTOMCAT) were used to simulate the surface ozone depletion events. Incorporating the latest surface snow salinity data obtained for the Weddell Sea into the models resulted in improved agreement between the modelled and measured BrO concentrations above Eureka. MERRA-2 global reanalysis data and the FLEXPART particle dispersion model were used to study the link between the ozone and HDO depletion. In general, the modelled ozone and BrO showed good agreement with the ground-based observations; however, the modelled BrO and ozone in the nearsurface layer are quite sensitive to the snow salinity. HDO depletion observed during these two blowing-snow ODEs was found to be weaker than pure Rayleigh fractionation. This work provides evidence of a blowing-snow sublimation process, which is a key step in producing bromine-enriched seasalt aerosol.

show abstract

Tropospheric water vapour isotopologue data (H<sub>2</sub><sup>16</sup>O, H<sub>2</sub><sup>18</sup>O, and HD<sup>16</sup>O) as obtained from NDACC/FTIR solar absorption spectra

Cited by 39 publications

References 25 publications

Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site

Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site

Comparison of ground-based and satellite measurements of water vapour vertical profiles over Ellesmere Island, Nunavut

Response to Referee #2

Contact Info

Product

Resources

About