The MUSICA MetOp/IASI H&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O and δD products: characterisation and long-term comparison to NDACC/FTIR data

Wiegele, A.; Schneider, Mat­thias; Hase, Frank; Barthlott, Sabine; García, Omaira; Sepúlveda, Eliezer; González, Y.; Blumenstock, Thomas; Raffalski, Uwe; Gisi, M.; Kohlhepp, R.

doi:10.5194/amt-7-2719-2014

Cited by 39 publications

(83 citation statements)

References 28 publications

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“…The instrument and methods were successfully applied in vertical-profile flights during the MUSICA airborne research campaign at the Canary Islands in the summer of 2013 (Schneider et al, 2014). The campaign mainly focused on the validation of remote sensing measurements from ground and space by performing simultaneous in situ measurements.…”

Section: Discussionmentioning

confidence: 99%

“…In a recent paper by Schneider et al (2014), the ISOWAT II in situ measurements presented here were used for a first validation of space-and ground-based remote sensing measurements of δD. We aim to enlarge the data set for this purpose by performing regular profiling of the troposphere with a new version of ISOWAT onboard the IAGOS-CARIBIC passenger aircraft (Brenninkmeijer et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…In situ airborne measurements have been performed with different techniques and on various platforms (Webster and Heymsfield, 2003;Sayres et al, 2009;Iannone et al, 2009;Sodemann et al, 2013). With the exception of Herman et al (2014), these measurements were performed without what we believe is a critical component especially for a validation experiment: inflight instrument-performance analysis by measuring a calibration-gas standard.…”

Section: Dyroff Et Al: Airborne Profiles Of Hdo / H 2 16 O In Thementioning

confidence: 99%

“…MetOp overpasses took place on a trajectory from northeast to southwest, where IASI scanned transversal to its flight direction. The individual spectra were filtered based on data quality and cloudiness as described in Wiegele et al (2014). The ground location of all quality-filtered vertical profile measurements obtained during the campaign is depicted as circles in Fig.…”

Section: Objective and Realizationmentioning

confidence: 99%

“…The flights were coordinated with ground-based (Network for the Detection of Atmospheric Composition Change, NDACC) and space-based (Infrared Atmospheric Sounding Interferometer, IASI) FTIR remote sensing measurements of δD(H 2 O) as a means to validate the remote sensing humidity and δD(H 2 O) data products. The results of the validation are presented in detail in a separate paper (Schneider et al, 2014). The profiles were obtained with a high vertical resolution of around 3 m. By analyzing humidity and δD(H 2 O) correlations we were able to identify different layers of air masses with specific isotopic signatures.…”

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confidence: 99%

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Airborne in situ vertical profiling of HDO / H216O in the subtropical troposphere during the MUSICA remote sensing validation campaign

et al. 2015

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Abstract. Vertical profiles of water vapor (H 2 O) and its isotope ratio D/H expressed as δD(H 2 O) were measured in situ by the ISOWAT II diode-laser spectrometer during the MUlti-platform remote Sensing of Isotopologues for investigating the Cycle of Atmospheric water (MUSICA) airborne campaign. We present recent modifications of the instrument design. The instrument calibration on the ground as well as in flight is described. Based on the calibration measurements, the humidity-dependent uncertainty of our airborne data is determined. For the majority of the airborne data we achieved an accuracy (uncertainty of the mean) of (δD) ≈ 10 ‰. Vertical profiles between 150 and ∼ 7000 m were obtained during 7 days in July and August 2013 over the subtropical North Atlantic Ocean near Tenerife. The flights were coordinated with ground-based (Network for the Detection of Atmospheric Composition Change, NDACC) and space-based (Infrared Atmospheric Sounding Interferometer, IASI) FTIR remote sensing measurements of δD(H 2 O) as a means to validate the remote sensing humidity and δD(H 2 O) data products. The results of the validation are presented in detail in a separate paper (Schneider et al., 2014). The profiles were obtained with a high vertical resolution of around 3 m. By analyzing humidity and δD(H 2 O) correlations we were able to identify different layers of air masses with specific isotopic signatures. The results are discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Dyroff Et Al: Airborne Profiles Of Hdo / H 2 16 O In Thementioning

confidence: 99%

Section: Objective and Realizationmentioning

confidence: 99%

mentioning

confidence: 99%

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Airborne in situ vertical profiling of HDO / H216O in the subtropical troposphere during the MUSICA remote sensing validation campaign

et al. 2015

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Moist processes during MJO events as diagnosed from water isotopic measurements from the IASI satellite

Tuinenburg

Risi

Lacour

et al. 2015

J. Geophys. Res. Atmos.

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This study aims to investigate some characteristics of the moist processes of the Madden-Julian oscillation (MJO), by making use of joint HDO (or δD) and H2O vapor measurements. The MJO is the main intraseasonal mode of the tropical climate but is hard to properly simulate in global atmospheric models. The joint use of δD-H2O diagnostics yields additional information compared to sole humidity measurements. We use midtropospheric Infrared Atmospheric Sounding Interferometer (IASI) satellite δD and H2O measurements to determine the mean MJO humidity and δD evolution. Moreover, by making use of high temporal resolution data, we determine the variability in this evolution during about eight MJO events from 2010 to 2012 (including those monitored during the DYNAMO (the Dynamics of the MJO), CINDY (Cooperative Indian Ocean Experiment in Y2011) campaign). These data have a higher spatiotemporal coverage than previous δD measurements, enabling the sampling of individual MJO events. IASI measurements over the Indian Ocean confirm earlier findings that the moistening before the precipitation peak of an MJO event is due to water vapor slightly enriched in HDO. There is then a HDO depletion around the precipitation peak that also corresponds to the moister environment. Most interevent variability determined in the current study occurs 5 to 10 days after the MJO event. In 75% of the events, humidity decreases while the atmosphere remains depleted. In a quarter of the events, humidity increases simultaneously with an increase in δD. After this, the advection of relatively dry and enriched air brings back the state to the mean. Over the maritime continent, δD-H2O cycles are more variable on time scales shorter than the MJO and the interevent variability is larger than over the Indian Ocean. The sequence of moistening and drying processes as revealed by the q-δD cycles can be used as a benchmark to evaluate the representation of moist processes in models. This is done here by comparing observations to simulations of the isotope enabled LMDZ (Laboratoire de Météorologie Dynamique Zoom) global climate model nudged with reanalysis wind fields. These simulations also give information to investigate possible physical origins of the observed q-δD cycles. Disciplines Medicine and Health Sciences | Social and Behavioral Sciences Publication DetailsTuinenburg, O. A., Risi, C., Lacour, J. L., Schneider, M., Wiegele, A., Worden, J., Kurita, N., Duvel, J. P., Deutscher, N., Bony, S., Coheur, P. Abstract This study aims to investigate some characteristics of the moist processes of the Madden-Julian oscillation (MJO), by making use of joint HDO (or D) and H 2 O vapor measurements. The MJO is the main intraseasonal mode of the tropical climate but is hard to properly simulate in global atmospheric models. The joint use of D-H 2 O diagnostics yields additional information compared to sole humidity measurements. We use midtropospheric Infrared Atmospheric Sounding Interferometer (IASI) satellite D and H 2 O measurements to determine th...

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Stable isotopes in atmospheric water vapor and applications to the hydrologic cycle

Galewsky

Steen‐Larsen

Field

et al. 2016

Reviews of Geophysics

327

314

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The measurement and simulation of water vapor isotopic composition has matured rapidly over the last decade, with long‐term data sets and comprehensive modeling capabilities now available. Theories for water vapor isotopic composition have been developed by extending the theories that have been used for the isotopic composition of precipitation to include a more nuanced understanding of evaporation, large‐scale mixing, deep convection, and kinetic fractionation. The technologies for in situ and remote sensing measurements of water vapor isotopic composition have developed especially rapidly over the last decade, with discrete water vapor sampling methods, based on mass spectroscopy, giving way to laser spectroscopic methods and satellite‐ and ground‐based infrared absorption techniques. The simulation of water vapor isotopic composition has evolved from General Circulation Model (GCM) methods for simulating precipitation isotopic composition to sophisticated isotope‐enabled microphysics schemes using higher‐order moments for water and ice size distributions. The incorporation of isotopes into GCMs has enabled more detailed diagnostics of the water cycle and has led to improvements in its simulation. The combination of improved measurement and modeling of water vapor isotopic composition opens the door to new advances in our understanding of the atmospheric water cycle, in processes ranging from the marine boundary layer, through deep convection and tropospheric mixing, and into the water cycle of the stratosphere. Finally, studies of the processes governing modern water vapor isotopic composition provide an improved framework for the interpretation of paleoclimate proxy records of the hydrological cycle.

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The MUSICA MetOp/IASI H<sub>2</sub>O and δD products: characterisation and long-term comparison to NDACC/FTIR data

Cited by 39 publications

References 28 publications

Airborne in situ vertical profiling of HDO / H<sub>2</sub><sup>16</sup>O in the subtropical troposphere during the MUSICA remote sensing validation campaign

Airborne in situ vertical profiling of HDO / H<sub>2</sub><sup>16</sup>O in the subtropical troposphere during the MUSICA remote sensing validation campaign

Moist processes during MJO events as diagnosed from water isotopic measurements from the IASI satellite

Stable isotopes in atmospheric water vapor and applications to the hydrologic cycle

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The MUSICA MetOp/IASI H&lt;sub&gt;2&lt;/sub&gt;O and δD products: characterisation and long-term comparison to NDACC/FTIR data

Cited by 39 publications

References 28 publications

Airborne in situ vertical profiling of HDO / H&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;16&lt;/sup&gt;O in the subtropical troposphere during the MUSICA remote sensing validation campaign

Airborne in situ vertical profiling of HDO / H&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;16&lt;/sup&gt;O in the subtropical troposphere during the MUSICA remote sensing validation campaign

Moist processes during MJO events as diagnosed from water isotopic measurements from the IASI satellite

Stable isotopes in atmospheric water vapor and applications to the hydrologic cycle

Contact Info

Product

Resources

About

The MUSICA MetOp/IASI H<sub>2</sub>O and δD products: characterisation and long-term comparison to NDACC/FTIR data

Airborne in situ vertical profiling of HDO / H<sub>2</sub><sup>16</sup>O in the subtropical troposphere during the MUSICA remote sensing validation campaign

Airborne in situ vertical profiling of HDO / H<sub>2</sub><sup>16</sup>O in the subtropical troposphere during the MUSICA remote sensing validation campaign