Chemical ozone loss and ozone mini-hole event during the Arctic winter 2010/2011 as observed by SCIAMACHY and GOME-2

Hommel, R.; Eichmann, Kai‐Uwe; Aschmann, J.; Bramstedt, K.; Weber, Mark; Savigny, Christian von; Richter, Andreas; Rozanov, A.; Wittrock, F.; Khosrawi, Farahnaz; Bauer, Ralf; Burrows, J. P.

doi:10.5194/acp-14-3247-2014

Cited by 34 publications

(50 citation statements)

References 92 publications

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“…MLS loss at these levels is larger than our estimations based on SMILES and SMR ozone. For comparison, the loss derived from SCIAMACHY observations by Hommel et al (2014) in a layer of 475-525 K is of the order of 1 ppmv which is roughly consistent with our results. Note that Hommel et al (2014) used the 38PVU criterion for defining the vortex edge.…”

Section: Comparison With Other Studiessupporting

confidence: 79%

“…Comparable studies of ozone loss in the winter 2009/2010 based on different analysis methods and measurements were done by Kuttippurath et al (2010), Wohltmann et al (2013) and Hommel et al (2014). The inferred loss of SMR ozone agrees with loss simulated using the chemical transport model ATLAS by Wohltmann et al (2013).…”

Section: Comparison With Other Studiesmentioning

confidence: 49%

“…The white contour lines denote the Lait modified potential vorticity of 38 PVU (1 PVU =1 × 10 −6 K m 2 kg −1 s −1 ) (Lait, 1994). The modified potential vorticity refers to the reference level 475 K. The potential vorticity of 38 PVU is also used for the vortex boundary in other studies (Sonkaew et al, 2013;Hommel et al, 2014). The polar vortex was formed at the beginning of December and stayed at high latitudes for 2 weeks (DOY −31 to −15) then distorted and split into two parts caused by changes in the wind fields due to a minor SSW in the middle of December (∼ −15 DOY).…”

Section: Dynamics Of the Arctic Winter 2009-2010mentioning

confidence: 99%

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The use of SMILES data to study ozone loss in the Arctic winter 2009/2010 and comparison with Odin/SMR data using assimilation techniques

et al. 2014

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Abstract. The Superconducting Submillimeter-Wave LimbEmission Sounder (SMILES) on board the International Space Station observed ozone in the stratosphere with high precision from October 2009 to April 2010. Although SMILES measurements only cover latitudes from 38 • S to 65 • N, the combination of data assimilation methods and an isentropic advection model allows us to quantify the ozone depletion in the 2009/2010 Arctic polar winter by making use of the instability of the polar vortex in the northern hemisphere. Ozone data from both SMILES and Odin/SMR (SubMillimetre Radiometer) for the winter were assimilated into the Dynamical Isentropic Assimilation Model for OdiN Data (DIAMOND). DIAMOND is an off-line wind-driven transport model on isentropic surfaces. Wind data from the operational analyses of the European Centre for Medium-Range Weather Forecasts (ECMWF) were used to drive the model. In this study, particular attention is paid to the cross isentropic transport of the tracer in order to accurately assess the ozone loss. The assimilated SMILES ozone fields agree well with the limitation of noise induced variability within the SMR fields despite the limited latitude coverage of the SMILES observations. Ozone depletion has been derived by comparing the ozone field acquired by sequential assimilation with a passively transported ozone field initialized on 1 December 2009. Significant ozone loss was found in different periods and altitudes from using both SMILES and SMR data: The initial depletion occurred at the end of January below 550K with an accumulated loss of 0.6-1.0 ppmv (approximately 20 %) by 1 April. The ensuing loss started from the end of February between 575 K and 650 K. Our estimation shows that 0.8-1.3 ppmv (20-25 %) of O 3 has been removed at the 600 K isentropic level by 1 April in volume mixing ratio (VMR).

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Section: Comparison With Other Studiessupporting

confidence: 79%

Section: Comparison With Other Studiesmentioning

confidence: 49%

Section: Dynamics Of the Arctic Winter 2009-2010mentioning

confidence: 99%

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The use of SMILES data to study ozone loss in the Arctic winter 2009/2010 and comparison with Odin/SMR data using assimilation techniques

et al. 2014

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“…The Arctic winter 2010/2011 has been well analysed, especially with respect to ozone loss (e.g. Manney et al, 2011;Sinnhuber et al, 2011;Arnone et al, 2012;Kuttippurath et al, 2012;Hommel et al, 2014). The dynamical perspective, and thus the exceptional dynamical conditions of this winter, was discussed in detail by Hurwitz et al (2011), Isaksen et al (2012, Strahan et al (2013), and Shaw and Perlwitz (2014).…”

Section: Introductionmentioning

confidence: 99%

Comparison of ECHAM5/MESSy Atmospheric Chemistry (EMAC) simulations of the Arctic winter 2009/2010 and 2010/2011 with Envisat/MIPAS and Aura/MLS observations

et al. 2018

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Abstract. We present model simulations with the atmospheric chemistry-climate model ECHAM5/MESSy Atmospheric Chemistry (EMAC) nudged toward European Centre for Medium-Range Weather Forecasts (ECMWF) ERAInterim reanalyses for the Arctic winters 2009/2010 and 2010/2011. This study is the first to perform an extensive assessment of the performance of the EMAC model for Arctic winters as previous studies have only made limited evaluations of EMAC simulations which also were mainly focused on the Antarctic winter stratosphere. We have chosen the two extreme Arctic winters 2009/2010 and 2010/2011 to evaluate the formation of polar stratospheric clouds (PSCs) and the representation of the chemistry and dynamics of the polar winter stratosphere in EMAC. The EMAC simulations are compared to observations by the Michelson Interferometer for Passive Atmospheric Soundings (Envisat/MIPAS) and the observations from the Aura Microwave Limb Sounder (Aura/MLS). The Arctic winter 2010/2011 was one of the coldest stratospheric winters on record, leading to the strongest depletion of ozone measured in the Arctic. The Arctic winter 2009/2010 was, from the climatological perspective, one of the warmest stratospheric winters on record. However, it was distinguished by an exceptionally cold stratosphere (colder than the climatological mean) from mid-December 2009 to mid-January 2010, leading to prolonged PSC formation and existence. Significant denitrification, the removal of HNO 3 from the stratosphere by sedimentation of HNO 3 -containing polar stratospheric cloud particles, occurred in that winter. In our comparison, we focus on PSC formation and denitrification. The comparisons between EMAC simulations and satellite observations show that model and measurements compare well for these two Arctic winters (differences for HNO 3 generally within ±20 %) and thus that EMAC nudged toward ECMWF ERA-Interim reanalyses is capable of giving a realistic representation of the evolution of PSCs and associated sequestration of gas-phase HNO 3 in the polar winter stratosphere. However, simulated PSC volume densities are smaller than the ones derived from Envisat/MIPAS observations by a factor of 3-7. Further, PSCs in EMAC are not simulated as high up (in altitude) as they are observed. This underestimation of PSC volume density and vertical extension of the PSCs results in an underestimation of the vertical redistribution of HNO 3 due to denitrification/re-nitrification. The differences found here between model simulations and observations stipulate further improvements in the EMAC set-up for simulating PSCs.

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“…2009/2010 has been presented by Sagi et al (2014). The comparison concluded that our estimation of the ozone loss is approximately 0.3 ppmv lower than other studies (Kuttippurath et al, 2010;Hommel et al, 2014;Wohltmann et al, 2013) . In Sagi et al (2014) 9 Atmos.…”

Section: Comparison With Other Studiesmentioning

confidence: 54%

A long term study of polar ozone loss derived from data assimilation of Odin/SMR observations

Sagi

Murtagh

2016

Preprint

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Abstract. Odin, a Swedish-led satellite project in collaboration with Canada, France and Finland, was launched on 20 February 2001 and continues to produce profiles of chemical species relevant to understanding the middle and upper atmosphere. Longterm observations of stratospheric ozone are useful for trend analysis of chemical ozone loss. This study concerns ozone loss over both poles utilizing 12 years of ozone data from Odin/Sub-Millimetre Radiometer (SMR). We have applied the data assimilation technique described by Rösevall et al. (2007) with a number of improvements to study the inter-annual Two SMR ozone products retrieved from the emission lines centred at 501 GHz and 544 GHz were used. An internal comparison of the two analyses using 501 GHz and 544 GHz ozone has been carried out by inspecting the vortex mean ozone in March and October during 2002and 2003-2012 in the Northern and Southern Hemisphere, respectively. Ozone de-10 rived from data assimilation using the two data sets match within 10% at the levels studied, while below 550 K in the Southern Hemispheremore than 50% of the difference is found. Here, 544 GHz ozone is 0.5 parts per million volume ( ppmv) lower than 501 GHz ozone because of better sensitivity in 544 GHz ozone in the lower stratosphere. Comparisons with other studies have been mainly performed against Sonkaew et al. (2013) since Sonkaew et al. (2013) is one of the few studies having consistent estimations of ozone depletion using a SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY (SCIA- IntroductionOzone depletion and climate change are indirectly linked. Several studies have predicted that the stratospheric cooling induced 5 by the increasing atmospheric carbon dioxide will enhance ozone depletion (Austin et al., 1992; Shindell et al., 1998). In practice, the Arctic lower stratosphere has been getting colder over the past decades (WMO, 2011). The linear dependence, demonstrated by (Rex et al., 2006), between the ozone depletion and the volume of air having temperature below the threshold for polar stratospheric cloud (PSC) formation implies that the stratospheric O 3 depletion in Northern Hemisphere may become worse if the cooling trend continues. It is therefore important to have continuous observations and trend analyses of the ozone 10 depletion.Ozone loss has been quantified by using a variety of techniques based on different assumptions and instruments (e.g. Eichmann et al., 2002;Grooß and Müller, 2003; Rex et al., 2006; Singleton et al., 2007; Tilmes et al., 2004; Tsvetkova et al., 2007). However, most of the studies were done for individual winters in the last decade. For instance, in the Arctic winter 2010/2011 several groups reported the unprecedented dramatic ozone depletion over the Arctic polar region approaching that 15 of the Antarctic ozone hole (e.g. Arnone et al., 2012; Manney et al., 2011; Sinnhuber et al., 2011). This winter was obviously different from other Arctic winters from 2000 since the polar vortex was strong and isolated the vo...

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Chemical ozone loss and ozone mini-hole event during the Arctic winter 2010/2011 as observed by SCIAMACHY and GOME-2

Abstract: Abstract. Record breaking loss of ozone (O 3

Cited by 34 publications

References 92 publications

The use of SMILES data to study ozone loss in the Arctic winter 2009/2010 and comparison with Odin/SMR data using assimilation techniques

The use of SMILES data to study ozone loss in the Arctic winter 2009/2010 and comparison with Odin/SMR data using assimilation techniques

Comparison of ECHAM5/MESSy Atmospheric Chemistry (EMAC) simulations of the Arctic winter 2009/2010 and 2010/2011 with Envisat/MIPAS and Aura/MLS observations

A long term study of polar ozone loss derived from data assimilation of Odin/SMR observations

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