Observation of ozone enhancement in the lower troposphere over East Asia from a space-borne ultraviolet spectrometer

Hayashida, Sachiko; Liu, Xueliang; Ono, Akira; Yang, Kai; Chance, K.

doi:10.5194/acp-15-9865-2015

Cited by 29 publications

(23 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analyses generally showed good agreement with other correlative data but revealed limited sensitivity to ozone in the lower troposphere and near the surface. In addition to these evaluations, the PROFOZ product has been used to study dynamical and chemical features associated with stratospheric-tropospheric exchange, to evaluate the transport of anthropogenic pollution (Pittman et al, 2009;Liu et al, 2010aLiu et al, , 2013bWalker et al, 2010;Su et al, 2011), to constrain tropospheric ozone sources Kim et al, 2013), to initialize boundary conditions for air quality modeling (Pour-Biazare et al, 2011), and to study ozone enhancement in the lower troposphere over central and eastern China (Hayashida et al, 2015(Hayashida et al, , 2016.…”

Section: Profile Retrieval Algorithmsmentioning

confidence: 99%

The Ozone Monitoring Instrument: overview of 14 years in space

et al. 2018

Self Cite

View full text Add to dashboard Cite

Abstract. This overview paper highlights the successes of the Ozone Monitoring Instrument (OMI) on board the Aura satellite spanning a period of nearly 14 years. Data from OMI has been used in a wide range of applications and research resulting in many new findings. Due to its unprecedented spatial resolution, in combination with daily global coverage, OMI plays a unique role in measuring trace gases important for the ozone layer, air quality, and climate change. With the operational very fast delivery (VFD; direct readout) and near real-time (NRT) availability of the data, OMI also plays an important role in the development of operational services in the atmospheric chemistry domain.

show abstract

Section: Profile Retrieval Algorithmsmentioning

confidence: 99%

The Ozone Monitoring Instrument: overview of 14 years in space

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although validation of the ozone profile product (mostly earlier versions) has been partially performed against aircraft, ozonesonde, and microwave limb sounder (MLS) data, these evaluations are limited to certain time periods and/or spatial region and/or to only portion of the product (e.g., OC or TOC only) (Bak et al, 2013a;Hayashida et al, 2015;Lal et al, 2013;Liu et al, 2010a, b;Pittman et al, 2009;Sellitto et al, 2011;Wang et al, 2011;Yang et al, 2007;Ziemke et al, 2014). Additionally, the quality of ozone profile retrievals is very sensitive to the signal-to-noise ratio (SNR) of the radiance measurements as well as their radiometric calibration, which may degrade over time as shown in GOME and GOME-2 retrievals (Cai et al, 2012;Liu et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Validation of 10-year SAO OMI Ozone Profile (PROFOZ) product using ozonesonde observations

et al. 2017

Self Cite

View full text Add to dashboard Cite

Abstract. We validate the Ozone Monitoring Instrument (OMI) Ozone Profile (PROFOZ) product from October 2004 through December 2014 retrieved by the Smithsonian Astrophysical Observatory (SAO) algorithm against ozonesonde observations. We also evaluate the effects of OMI row anomaly (RA) on the retrieval by dividing the dataset into before and after the occurrence of serious OMI RA, i.e., pre-RA (2004) and post-RA (2009-2014. The retrieval shows good agreement with ozonesondes in the tropics and midlatitudes and for pressure <∼ 50 hPa in the high latitudes. It demonstrates clear improvement over the a priori down to the lower troposphere in the tropics and down to an average of ∼ 550 (300) hPa at middle (high) latitudes. In the tropics and midlatitudes, the profile mean biases (MBs) are less than 6 %, and the standard deviations (SDs) range from 5 to 10 % for pressure <∼ 50 hPa to less than 18 % (27 %) in the tropics (midlatitudes) for pressure >∼ 50 hPa after applying OMI averaging kernels to ozonesonde data. The MBs of the stratospheric ozone column (SOC, the ozone column from the tropopause pressure to the ozonesonde burst pressure) are within 2 % with SDs of < 5 % and the MBs of the tropospheric ozone column (TOC) are within 6 % with SDs of 15 %. In the high latitudes, the profile MBs are within 10 % with SDs of 5-15 % for pressure <∼ 50 hPa but increase to 30 % with SDs as great as 40 % for pressure >∼ 50 hPa. The SOC MBs increase up to 3 % with SDs as great as 6 % and the TOC SDs increase up to 30 %. The comparison generally degrades at larger solar zenith angles (SZA) due to weaker signals and additional sources of error, leading to worse performance at high latitudes and during the midlatitude winter. Agreement also degrades with increasing cloudiness for pressure >∼ 100 hPa and varies with cross-track position, especially with large MBs and SDs at extreme off-nadir positions. In the tropics and midlatitudes, the post-RA comparison is considerably worse with larger SDs reaching 2 % in the stratosphere and 8 % in the troposphere and up to 6 % in TOC. There are systematic differences that vary with latitude compared to the pre-RA comparison. The retrieval comparison demonstrates good long-term stability during the pre-RA period but exhibits a statistically significant trend of 0.14-0.7 % year −1 for pressure <∼ 80 hPa, 0.7 DU year −1 in SOC, and −0.33 DU year −1 in TOC during the post-RA period. The spatiotemporal variation of retrieval performance suggests the need to improve OMI's radiometric calibration especially during the post-RA period to maintain the long-term stability and reduce the latitude/season/SZA and cross-track dependency of retrieval quality.

show abstract

“…We chose two observation points in East Asia, 35 • N, 116.5 • E (central-east China, CEC, located between Beijing and Shanghai) and 31 • N, 127.25 • E (East China Sea, ECS, centered among China, Japan, South Korea, and Taiwan). The CEC is the area where largest amount of boundary layer ozone was observed from the Aura/OMI measurement (Hayashida et al, 2015). The ECS was chosen for a comparison of urban area and ocean.…”

Section: Atmospheric Conditionsmentioning

confidence: 99%

Vertical profile of tropospheric ozone derived from synergetic retrieval using three different wavelength ranges, UV, IR, and microwave: sensitivity study for satellite observation

Sato

Sagawa

et al. 2018

Atmos. Meas. Tech.

View full text Add to dashboard Cite

Abstract. We performed a feasibility study of constraining the vertical profile of the tropospheric ozone by using a synergetic retrieval method on multiple spectra, i.e., ultraviolet (UV), thermal infrared (TIR), and microwave (MW) ranges, measured from space. This work provides, for the first time, a quantitative evaluation of the retrieval sensitivity of the tropospheric ozone by adding the MW measurement to the UV and TIR measurements. Two observation points in East Asia (one in an urban area and one in an ocean area) and two observation times (one during summer and one during winter) were assumed. Geometry of line of sight was nadir down-looking for the UV and TIR measurements, and limb sounding for the MW measurement. The retrieval sensitivities of the ozone profiles in the upper troposphere (UT), middle troposphere (MT), and lowermost troposphere (LMT) were estimated using the degree of freedom for signal (DFS), the pressure of maximum sensitivity, reduction rate of error from the a priori error, and the averaging kernel matrix, derived based on the optimal estimation method. The measurement noise levels were assumed to be the same as those for currently available instruments. The weighting functions for the UV, TIR, and MW ranges were calculated using the SCIATRAN radiative transfer model, the Line-By-Line Radiative Transfer Model (LBLRTM), and the Advanced Model for Atmospheric Terahertz Radiation Analysis and Simulation (AMATERASU), respectively. The DFS value was increased by approximately 96, 23, and 30 % by adding the MW measurements to the combination of UV and TIR measurements in the UT, MT, and LMT regions, respectively. The MW measurement increased the DFS value of the LMT ozone; nevertheless, the MW measurement alone has no sensitivity to the LMT ozone. The pressure of maximum sensitivity value for the LMT ozone was also increased by adding the MW measurement. These findings indicate that better information on LMT ozone can be obtained by adding constraints on the UT and MT ozone from the MW measurement. The results of this study are applicable to the upcoming air-quality monitoring missions, APOLLO, GMAP-Asia, and uvSCOPE.

show abstract

Observation of ozone enhancement in the lower troposphere over East Asia from a space-borne ultraviolet spectrometer

Cited by 29 publications

References 44 publications

The Ozone Monitoring Instrument: overview of 14 years in space

The Ozone Monitoring Instrument: overview of 14 years in space

Validation of 10-year SAO OMI Ozone Profile (PROFOZ) product using ozonesonde observations

Vertical profile of tropospheric ozone derived from synergetic retrieval using three different wavelength ranges, UV, IR, and microwave: sensitivity study for satellite observation

Contact Info

Product

Resources

About