S
Song Liu
Researcher at German Aerospace Center
Publications - 16
Citations - 172
Song Liu is an academic researcher from German Aerospace Center. The author has contributed to research in topics: Differential optical absorption spectroscopy & Stratosphere. The author has an hindex of 7, co-authored 13 publications receiving 106 citations. Previous affiliations of Song Liu include Southern University of Science and Technology.
Papers
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Journal ArticleDOI
The STRatospheric Estimation Algorithm from Mainz (STREAM):estimating stratospheric NO 2 from nadir-viewing satellites by weighted convolution
Steffen Beirle,Christoph Hörmann,Patrick Jöckel,Song Liu,Marloes Penning de Vries,Andrea Pozzer,Holger Sihler,Pieter Valks,Thomas Wagner +8 more
TL;DR: The STRATospheric Estimation Algorithm from Mainz (STREAM) as mentioned in this paper determines stratospheric columns of NO2 which are needed for the retrieval of tropospheric column from satellite observations.
Journal ArticleDOI
Estimation of Surface NO2 Concentrations over Germany from TROPOMI Satellite Observations Using a Machine Learning Method
TL;DR: In this paper, a machine learning approach is used to estimate surface NO2 concentrations over Germany using satellite data and several meteorological parameters, which is validated against ground-based in situ air quality monitoring network measurements and regional chemical transport model (CTM) simulations.
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NO2 Retrieval from the Environmental Trace Gases Monitoring Instrument (EMI): Preliminary Results and Intercomparison with OMI and TROPOMI
Liangxiao Cheng,Jinhua Tao,Pieter Valks,Chao Yu,Song Liu,Yapeng Wang,Xiaozhen Xiong,Zifeng Wang,Liangfu Chen +8 more
TL;DR: The capability of using EMI for global NO2 monitoring is demonstrated by using the differential optical absorption spectrometry (DOAS) method and the EMI measurements in the VIS1 band for retrievals of NO2.
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An improved total and tropospheric NO 2 column retrieval for GOME-2
TL;DR: In this article, an improved algorithm for the retrieval of total and tropospheric nitrogen dioxide (NO2) columns from the Global Ozone Monitoring Experiment-2 (GOME-2) is presented.
Journal ArticleDOI
An improved air mass factor calculation for nitrogen dioxide measurements from the Global Ozone Monitoring Experiment-2 (GOME-2)
Song Liu,Pieter Valks,Gaia Pinardi,Jian Xu,Athina Argyrouli,Athina Argyrouli,Ronny Lutz,L. Gijsbert Tilstra,Vincent Huijnen,François Hendrick,Michel Van Roozendael +10 more
TL;DR: In this paper, an improved tropospheric nitrogen dioxide ( NO2 ) retrieval algorithm from the Global Ozone Monitoring Experiment-2 (GOME-2) instrument based on air mass factor (AMF) calculations performed with more realistic model parameters is presented.