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Tsegaye Tadesse, Deborah Bathke, Nicole Wall, Jacob Petr, and Tonya Haigh

Africa is highly vulnerable to adverse impacts of climate change such as increased temperatures, reductions in precipitation, and increased climate variability. In many regions, such as the Greater Horn of Africa (GHA), the effects of these changes are compounded by rapid population growth, high poverty levels, dependence on rain-fed agriculture, and low adaptive capacity. Given the great uncertainty in climate projections for the GHA, early warning systems that are robust to evolving climate

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Neil J. Holbrook, Jianping Li, Matthew Collins, Emanuele Di Lorenzo, Fei-Fei Jin, Thomas Knutson, Mojib Latif, Chongyin Li, Scott B. Power, Rhonghui Huang, and Guoxiong Wu

Pacific oscillation (IPO) a real and dynamic feature of the climate system? Cross-scale interactions between El Niño–Southern Oscillation (ENSO), decadal variability, and anthropogenic climate change. Unambiguous detection and attribution of anthropogenic climate change above natural decadal to multidecadal climate variability—how best to do this? Decadal modes on regional climates—focusing on the Asian monsoon. Further details on the agenda and most presentations are available at the workshop web

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Olivia Martius, A. Hering, M. Kunz, A. Manzato, S. Mohr, L. Nisi, and S. Trefalt

-term statistics of hail; convection and hail in a changing climate; microphysics and dynamics of hailstorms: observations and modeling; hail damage and hail damage prevention; and nowcasting and forecasting of hail. LOCAL PROBABILITIES AND LONG-TERM STATISTICS OF HAIL. The contributors to this session presented local-, regional-, and continental-scale hail frequency estimates and analyses of hail-conducive atmospheric environments. Hail occurrence statistics are based mainly on radar- or satellite

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P. Michael Link, Tim Brücher, Martin Claussen, Jasmin S. A. Link, and Jürgen Scheffran

reduced precipitation and droughts affect water security and crop yields in a negative way, then human security is at stake, particularly if the population increases in size. Regional water and food crises, combined with forced migration, can disrupt established networks, for example, between farmers and herders. It can even destabilize societies and provoke additional violence in a region that is already considerably affected by violent conflict. This session assessed the latest empirical results on

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Andrew W. Robertson, Arun Kumar, Malaquias Peña, and Frederic Vitart

), though with undesirable side effects. Very high-horizontal-resolution experiments performed as part of the Minerva Project, which is a seamless high-resolution climate prediction system, did not improve the propagation of the MJO, although the amplitude and spread of the MJO forecasts increased significantly when the model’s horizontal resolution is increased from T319 to T639 (about 64–32-km grid size), and remain constant from T639 to T1279 (about 32–16 km). Stochastic physics in the ECMWF System 4

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Janet Barlow, Martin Best, Sylvia I. Bohnenstengel, Peter Clark, Sue Grimmond, Humphrey Lean, Andreas Christen, Stefan Emeis, Martial Haeffelin, Ian N. Harman, Aude Lemonsu, Alberto Martilli, Eric Pardyjak, Mathias W Rotach, Susan Ballard, Ian Boutle, Andy Brown, Xiaoming Cai, Matteo Carpentieri, Omduth Coceal, Ben Crawford, Silvana Di Sabatino, Junxia Dou, Daniel R. Drew, John M. Edwards, Joachim Fallmann, Krzysztof Fortuniak, Jemma Gornall, Tobias Gronemeier, Christos H. Halios, Denise Hertwig, Kohin Hirano, Albert A. M. Holtslag, Zhiwen Luo, Gerald Mills, Makoto Nakayoshi, Kathy Pain, K. Heinke Schlünzen, Stefan Smith, Lionel Soulhac, Gert-Jan Steeneveld, Ting Sun, Natalie E Theeuwes, David Thomson, James A. Voogt, Helen C. Ward, Zheng-Tong Xie, and Jian Zhong

Reading, Reading, United Kingdom With the majority of people experiencing weather in urban areas, it is critical to understand cities, weather, and climate impacts. Increasing climate extremes (e.g., heat stress, air pollution, flash flooding) combined with the density of people means it is essential that city infrastructure and operations can withstand high-impact weather. Thus, there is a huge opportunity to mitigate climate change effects and provide healthier environments through design and

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Jinyoung Rhee, Wenju Cai, Neil Plummer, Mannava Sivakumar, Nina Horstmann, Bin Wang, and Dewi Kirono

While there have been numerous international symposia and conferences regarding the issue of drought, few have dealt with both drought prediction and monitoring simultaneously. To connect the dots between drought prediction, monitoring, and decision making, the Asia-Pacific Economic Cooperation (APEC) Climate Symposium 2013 was held with the theme of regional cooperation on drought prediction science for disaster preparedness and management (

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Sushil K. Dash, Saroj K. Mishra, Sandeep Sahany, V. Venugopal, Karumuri Ashok, and Akhilesh Gupta

services, IMD uses models such as the Global Forecasting System (GFS) T574L64 (25 km), Advanced Research version of the Weather Research and Forecasting Model (WRF-ARW; 9 km, 3 km), Advanced Regional Prediction System (ARPS; 9 km), and Warning Decision Support System–Integrated Information (WDSS-II) for forecasting in the time scales of 7 days, 1 day to 36 h, 6–24 h, and 0–2 h, respectively. It is planned to use GFS at T1534 resolution and the coupled model Coupled Forecast System (CFS), version 2, for

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P. O. Canziani, A. O'Neill, R. Schofield, M. Raphael, G. J. Marshall, and G. Redaelli

A World Climate Research Programme (WCRP) Special Workshop titled the “Climatic effects of ozone depletion in the Southern Hemisphere: Assessing the evidence and identifying gaps in the current knowledge” focused on the current understanding of Southern Hemisphere (SH) ozone depletion, in particular high-latitude ozone depletion, with regards to its impacts on hemispheric climate and its role relative to greenhouse gas (GHG)–induced climate changes. The 2010 United Nations Environment Programme

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Hunter M. Jones, E. L. Mecray, S. D. Birkel, K. C. Conlon, P. L. Kinney, V. B. S. Silva, W. Solecki, and T. M. Surgeon Rogers

NIHHIS NORTHEAST DECISION CALENDAR WORKSHOP What : The National Integrated Heat Health Information System (NIHHIS) convened a regional workshop to understand the multidisciplinary user contexts for heat-health information, employing a decision calendar approach to document discipline-specific and time-scale-explicit decisions made to reduce heat-health risk. When : 18 October 2018 Where : Westborough, Massachusetts The National Integrated Heat Health Informa tion System (NIHHIS) Northeast

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