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The International Radiation Symposium 2016

doi: 10.1007/s00376-016-6180-1

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    [2] Sophie GODIN-BEEKMANN, Irina PETROPAVLOSKIKH, Stefan REIS, Paul NEWMAN, Wolfgang STEINBRECHT, Markus REX, Michelle L. SANTEE, Richard S. ECKMAN, Xiangdong ZHENG, Matthew B. TULLY, David S. STEVENSON, Paul YOUNG, John PYLE, Mark WEBER, Johanna TAMMINEN, Gina MILLS, Alkiviadis F. BAIS, Clare HEAVISIDE, Christos ZEREFOS, 2018: Erratum to: The Quadrennial Ozone Symposium 2016, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 368-369.  doi: 10.1007/s00376-018-0001-7
    [3] Wu Guoxiong, 1993: The Fourth International Symposium on Asian Monsoon Held in Japan, ADVANCES IN ATMOSPHERIC SCIENCES, 10, 134-134.  doi: 10.1007/BF02656962
    [4] Di XIAN, Peng ZHANG, Meng FANG, Chang LIU, Xu JIA, 2021: The First Fengyun Satellite International User Conference, ADVANCES IN ATMOSPHERIC SCIENCES, 38, 1429-1432.  doi: 10.1007/s00376-020-2011-5
    [5] Philip E. BETT, Adam A. SCAIFE, Chaofan LI, Chris HEWITT, Nicola GOLDING, Peiqun ZHANG, Nick DUNSTONE, Doug M. SMITH, Hazel E. THORNTON, Riyu LU, Hong-Li REN, 2018: Seasonal Forecasts of the Summer 2016 Yangtze River Basin Rainfall, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 918-926.  doi: 10.1007/s00376-018-7210-y
    [6] Hans VOLKERT, 2017: Putting Faces to Names: Snapshots of Two Committee Meetings, 95 Years Apart, Emphasize Continuous International Cooperation in the Atmospheric Sciences, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 571-575.  doi: 10.1007/s00376-017-6329-6
    [7] Huang Ronghui, Zhang Renhe, 1993: Brief News of International Workshop on Climate Variabilities (IWCV) Held on July 13-17,1992 in Beijing, ADVANCES IN ATMOSPHERIC SCIENCES, 10, 133-133.  doi: 10.1007/BF02656961
    [8] Marco Y. T. LEUNG, Wen ZHOU, Chi-Ming SHUN, Pak-Wai CHAN, 2018: Large-scale Circulation Control of the Occurrence of Low-level Turbulence at Hong Kong International Airport, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 435-444.  doi: 10.1007/s00376-017-7118-y
    [9] Chang Ki KIM, Seong Soo YUM, 2010: Local Meteorological and Synoptic Characteristics of Fogs Formed over Incheon International Airport in the West Coast of Korea, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 761-776.  doi: 10.1007/s00376-009-9090-7
    [10] BAI Jianhui, WANG Gengchen, 2003: Establishing a Ultraviolet Radiation Observational Network and Enhancing the Study on Ultraviolet Radiation, ADVANCES IN ATMOSPHERIC SCIENCES, 20, 767-774.  doi: 10.1007/BF02915401
    [11] HU Bo, WANG Yuesi, LIU Guangren, 2012: Relationship between Net Radiation and Broadband Solar Radiation in the Tibetan Plateau, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 135-143.  doi: 10.1007/s00376-011-0221-6
    [12] BAI Jianhui, WANG Gengchen, HU Fei, 2003: Ultraviolet Radiation in Overcast Sky at the Surface, ADVANCES IN ATMOSPHERIC SCIENCES, 20, 1007-1009.  doi: 10.1007/BF02915524
    [13] Bin WANG, Juan LI, Qiong HE, 2017: Variable and Robust East Asian Monsoon Rainfall Response to El Niño over the Past 60 Years (1957-2016), ADVANCES IN ATMOSPHERIC SCIENCES, 34, 1235-1248.  doi: 10.1007/s00376-017-7016-3
    [14] GE Xuyang, MA Yue, ZHOU Shunwu, Tim LI, 2015: Sensitivity of the Warm Core of Tropical Cyclones to Solar Radiation, ADVANCES IN ATMOSPHERIC SCIENCES, 32, 1038-1048.  doi: 10.1007/s00376-014-4206-0
    [15] Shunwu ZHOU, Yue MA, Xuyang GE, 2016: Impacts of the Diurnal Cycle of Solar Radiation on Spiral Rainbands, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 1085-1095.  doi: 10.1007/s00376-016-5229-5
    [16] Hui LIU, Bo HU, Yuesi WANG, Guangren LIU, Liqin TANG, Dongsheng JI, Yongfei BAI, Weikai BAO, Xin CHEN, Yunming CHEN, Weixin DING, Xiaozeng HAN, Fei HE, Hui HUANG, Zhenying HUANG, Xinrong LI, Yan LI, Wenzhao LIU, Luxiang LIN, Zhu OUYANG, Boqiang QIN, Weijun SHEN, Yanjun SHEN, Hongxin SU, Changchun SONG, Bo SUN, Song SUN, Anzhi WANG, Genxu WANG, Huimin WANG, Silong WANG, Youshao WANG, Wenxue WEI, Ping XIE, Zongqiang XIE, Xiaoyuan YAN, Fanjiang ZENG, Fawei ZHANG, Yangjian ZHANG, Yiping ZHANG, Chengyi ZHAO, Wenzhi ZHAO, Xueyong ZHAO, Guoyi ZHOU, Bo ZHU, 2017: Two Ultraviolet Radiation Datasets that Cover China, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 805-815.  doi: 10.1007/s00376-017-6293-1
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    [18] Chaofan LI, Wei CHEN, Xiaowei HONG, Riyu LU, 2017: Why Was the Strengthening of Rainfall in Summer over the Yangtze River Valley in 2016 Less Pronounced than that in 1998 under Similar Preceding El Niño Events?——Role of Midlatitude Circulation in August, ADVANCES IN ATMOSPHERIC SCIENCES, 34, 1290-1300.  doi: 10.1007/s00376-017-7003-8
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Manuscript History

Manuscript received: 15 July 2016
Manuscript accepted: 26 July 2016
通讯作者: 陈斌,
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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The International Radiation Symposium 2016

  • 1. The University of Auckland, Victoria Street West, Auckland 1142, New Zealand
  • 2. Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center, Dorfstrasse 337260 Davos Dorf, Switzerland
  • 3. Okayama University, 1 Chome- 1-1 Tsushimanaka, Kita Ward, Okayama, Okayama Prefecture 700-0082, Japan
  • 4. University of Illinois at Urbana-Champaign, Champaign, Illinois 61820, USA


  • The 2016 International Radiation Symposium, a joint venture between the IRC (International Radiation Commission) and IAMAS (International Association of Meteorology and Atmospheric Sciences), took place at the University of Auckland from April 16th to 22nd. The wide scope of atmospheric radiation research was apparent, with focuses ranging from the planetary to the particulate, and from the hourly to the millennial. The symposium, which was attended by 268 scientists from 28 countries, provided an excellent forum for the exchange of knowledge between modelers and experimentalists. (Fig.1)

    Two awards were presented by the IRC: the Young Scientist Award, to Zhibo ZHANG (Fig.2), and the Gold Medal Award,to Teruyuki NAKAJIMA (Fig.3). Both gave well-received keynote talks after accepting their awards at the conference dinner at the Auckland Museum.

    Figure fig1.  IRS 2016 group photo.

    Figure fig2.  Young Scientist winner Dr. Zhibo ZHANG.

    Figure fig3.  IRS Gold Medal winner Prof. Teruyuki NAKAJIMA and IRC president Prof. Werner SCHMUTZ.

    Figure fig4.  Local organizer Prof. Roger DAVIES.

2.Plenary sessions
  • The four keynote talks, in addition to the award winners' presentations, were the highlight of the conference. Each speaker summarized an important area of radiation research, generating several questions and a great deal of discussion afterwards.

    David DINER talked about the unique advantages of multi-angle imaging, such as the ability to detect thin hazes by looking through a larger airmass, and reported that MISR winds can significantly improve weather forecasting.He also discussed the MAIA (Multi-Angle Imager for Aerosols) project, which aims to determine the impact of aerosols on human health by linking satellite and epidemiological data.

    Martin WILD reported several advances in the understanding of the global energy balance.~He noted that the multimodel mean of the clear-sky energy budget in CMIP5 agrees well with observations, but the variations between individual models are large. Separate energy balances were calculated for the land and ocean, and these brought the value for latent heat to within the error bars of the observations of the precipitation community, going some way toward solving a long-standing discrepancy.

    Richard McKENZIE gave a comprehensive review of all the relevant aspects of current research in the field of solar UV radiation. He highlighted the work done at Lauder on ozone measurement and noted that New Zealand has the highest rates of skin cancer in the world.

    Lesley GRAY also gave a talk covering solar UV, in which she described how the surface response to changes in solar radiation is a complicated mix of ``top-down'' and ``bottom-up'' effects. The effects of the 11-year cycle are reasonably clear in the middle atmosphere, but their potential influence on the circulation of the lower atmosphere, affecting surface climate, is much harder to understand.

3.General remote sensing
  • At present, the radiative transfer model is usually the bottleneck in a physical retrieval algorithm. Xu LIU presented a model, PCTRM (Principal Component-based Radiative Transfer Model), which allows spectral data to be compressed through eigenvector representation, allowing for improved speed.

    Bing LIN presented a method to determine the surface pressure remotely using the differential absorption of oxygen.

    Marwan KATURJI showed results on the remote infrared sensing of eddies.

4.Understanding climate using satellite data
  • The phenomenon of brightening in Europe is widely observed, but, as Arturo Sanchez-LORENZO reported, it is still not captured fully by satellites. It was suggested that this may be due to temporally varying aerosols.

    B. J. SOHN showed that including a representation of atmospheric stability allows better modeling of the Pacific Walker Circulation and El Niño-like events.

    Dominique BOUNIOL documented the contribution of the mesoscale convective system to the energy and water budgets of the tropics.

    The negative feedback between cloud-top height and surface temperature was investigated by Abhnil PRASAD using measurements from CALIPSO.

5.Southern Ocean and Antarctica: Radiation, clouds, aerosols and sea-ice
  • Looking downwards from satellites and upwards from the surface of the ocean, a network of observations is helping to improve our understanding of the Southern Ocean and Antarctica.

    On the sea-borne side, Makoto KUJI used observations from shipboard whole-sky cameras and ceilometers to produce maps of cloud fraction for the region between Japan and the Antarctic.

    Yuekui YANG found that snow blowing in the Antarctic can have an appreciable radiative effect --- about 5 W m$^{-2}$.

    Luca PALCHETTI noted the lack of observations in the far infrared spectrum of surface longwave radiation over the east Antarctic plateau.

    Roger DAVIES , who is also a Local Organizer (Fig.~4), presented observations from MISR of the cloud morphology over the South Pacific, and discussed the microphysics that could be inferred from these.The aim was to determine whether there were observable differences between the hemispheres, which was found to be the case.

6.Particle radiative properties
  • Michael KAHNERT, the invited speaker, presented a novel particle model for the light scattering properties of heterogeneous aerosols with complex shapes. The performance of this ``core-grey-shell'' model in predicting scattering properties was investigated.

    Another highlight was the talk given by Konrad KANDLER, who presented 3D images, obtained through scanning electron microscopy, of mineral dust in which several different minerals were aggregated.

7.Radiation budget and forcing
  • The radiation budget and radiative forcing session addressed the principle of the greenhouse effect and global warming. In particular, the specific contributions of energy input and output in the Earth's atmosphere on a global scale were presented. Martin WILD estimated the amount of longwave radiation with high accuracy and with comparison to ground-based measurements.

    Norman LOEB described the failure of land surface models that do not allow for divergence from the mean climatology of a region to account for droughts, with reference to the millennium drought recently experienced by Australia.

    Two papers were presented on the brightening and dimming effects of air pollution over China and Japan.

8.Weather, climate and environment applications
  • As Allen HUANG noted, satellites provide most of the forecast skill for current weather predictions. He outlined the use of a hyperspectral environmental sounder for nearcasting severe weather events,and described the process of forecasting volcanic ash for aviation applications. An overview of the state of hyperspectral IR observations was given by David Tobin.

    Yunfei FU investigated aerosol--cirrus interactions, and found that the distance to the nearest cirrus cloud can have a 20 W m$^{-2}$ effect on the upward radiative forcing.

    Steven PLATNICK presented a suite of common algorithms for MODIS and VIIRS observations,which were produced in order to ensure continuity in the cloud climate data record.

    Hua ZHANG presented a calculation of the total effective radiative forcing of anthropogenic aerosols,while Toshihiko TAKEMURA examined the SO$_{2}$ aerosol effect, specifically in Asia. Talks were also given on cloud--radiation feedbacks in monsoon conditions and a coupled convection--cloud fraction parameterization.

9.Radiative transfer theory and modeling
  • A focus of this session was the new techniques and algorithms developed for the retrieval of optical properties from cloudy scenes, a task which presents many unique problems.

    Eli MLAWER introduced an updated version of RRTM, which makes use of advances in computing architecture to improve the speed of radiation calculations in GCMs. Improved radiative transfer models were also presented by Anthony DAVIS and Jerome VIDOT.

    Sheng-Hsiang WANG highlighted shortcomings in the assumption of uniform aerosol optical properties. A transport with two layers was observed and a two-layer aerosol model was developed to explain this.

10.Ice clouds: Light scattering, radiometric polarimetric remote sensing, and radiation
  • The invited speaker, Dr. Brian KAHN, spoke about retrieving ice-cloud properties from hyperspectral infrared observations. Observations from AIRS were found to be very useful in characterizing ice clouds, and multi-sensor approaches show a lot of promise.

    While observations have been successful, there is plenty of work to be done on the theory of light scattering by ice crystals, particularly in the resonance region (where the size of the scattering particle is similar to the incident wavelength), and effects such as photon tunneling need to be further explored. This may require a novel physical--geometric optics approach.

11.Surface measurements and field experiments
  • Von WALDEN presented the results of the ICECAPS (Integrated Characterization of Energy, Clouds, Atmospheric state, and Precipitation at Summit) experiment, which aimed to determine the effect of clouds on Greenland's surface energy budget.

    A lively discussion was sparked by invited speaker Julian GRöBNER's talk, in which he described an effort to measure cloud fractions 24 hours a day, using an infrared camera and a gold-coated spherical mirror observing 180$^\circ$ of the sky during day and night.

    Mikhail KRINITSKIY described another method for determining cloud fraction, which distinguishes between cloudy and clear sky using only color saturation.

    Improved measurements of aerosol--cloud interaction, aerosol optical depths, and the solar spectrum were also reported, and updates were given on several ongoing calibration and intercomparison projects for radiometers.

12.Ocean optics
  • Knut STAMNES, Jacek CHOWDHARY and Jürgen FISCHER all spoke on the topic of the retrieval of optical properties using satellite measurements of ocean color.

    Neural networks were used to train the algorithms presented in several talks at the conference. In this session, success was reported in their use for merging data collected simultaneously by different instruments, and for retrieving parameters from SeaWiFS (Sea-Viewing Wide Field-of-View Sensor), greatly improving the speed of the retrieval.

13.Solar UV radiation
  • Several authors presented the results of UV measurements over a period of about 20 years, in both oral presentations and posters, including overviews by invited speakers Germar BERNHARD and Ben LILEY. The measurements of broadband radiometers in general show no significant trend in recent decades. However, a strong daily and annual variability of UV exposure caused by clouds and aerosols has become apparent, and the research focus has shifted to this area.

    Finally, the consequences of UV exposure for both humans and materials were discussed. For humans, a balance between the positive (vitamin D production) and the negative (skin cancer) needs to be struck, and the research from this session will aid in this.




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