Increasing threat of landfalling typhoons in the western North Pacific between 1974 and 2013

Abstract Long-term changes between 1974 and 2013 were investigated in western North Pacific typhoons making landfall in East and Southeast Asia. Landfalling typhoon parameters, including the percentage of typhoons making landfall, the annual mean landfall intensity (LFI), and the annual accumulated power dissipation index at land, all increased significantly (at the 99% confidence level), by 14%, 17%, and 94%, respectively, over the study period. The increase in probability of a typhoon making landfall was attributed to an eastward shift of the typhoon genesis location. The LFI was decomposed into the product of the intensification rate and intensification duration. The product reproduced variations in the observed LFI well, and the correlation coefficient was high at 0.82. Although the intensification duration decreased slightly, an unprecedented increase in the intensification rate was observed, this increased the LFI. Warming of the upper ocean in the western North Pacific typhoon main intensification region, giving a higher tropical cyclone heat potential, yielded better oceanic conditions and overcame the worsening atmospheric conditions (increasing vertical wind shear), allowing typhoons to intensify. The increase in the annual accumulated power dissipation index was mainly caused by the increase in the LFI, and the annual number of typhoons and typhoon duration contributed much less. Increasing typhoon landfalling activities might heighten the threat posed by typhoons to populations and infrastructure in coastal regions.

[1]  Hailong Liu,et al.  PDO modulation of ENSO effect on tropical cyclone rapid intensification in the western North Pacific , 2016, Climate Dynamics.

[2]  Mark A. Saunders,et al.  Normalized Hurricane Damage in the United States: 1900–2005 , 2008 .

[3]  J. Chan,et al.  Interdecadal variability of tropical cyclone landfall in the Philippines from 1902 to 2005 , 2009 .

[4]  Wei Zhao,et al.  Observed upper ocean response to typhoon Megi (2010) in the Northern South China Sea , 2014 .

[5]  Jessica Blunden,et al.  State of the climate in 2013 , 2014 .

[6]  Bin Wang,et al.  A Long Neglected Damper in the El Niño—Typhoon Relationship: a ‘Gaia-Like’ Process , 2015, Scientific Reports.

[7]  Bin Wang,et al.  How Strong ENSO Events Affect Tropical Storm Activity over the Western North Pacific(. , 2002 .

[8]  P. Chu,et al.  The Abrupt Shift of Typhoon Activity in the Vicinity of Taiwan and Its Association with Western North Pacific–East Asian Climate Change , 2009 .

[9]  James B. Elsner,et al.  Examining the ENSO-typhoon hypothesis , 2003 .

[10]  Peter J. Webster,et al.  Modulation of North Pacific Tropical Cyclone Activity by Three Phases of ENSO , 2011 .

[11]  Kerry A. Emanuel,et al.  Environmental Factors Affecting Tropical Cyclone Power Dissipation , 2007 .

[12]  James C. McWilliams,et al.  Northwestern Pacific typhoon intensity controlled by changes in ocean temperatures , 2015, Science Advances.

[13]  M. C. Wu,et al.  Impacts of El Niño–Southern Oscillation Events on Tropical Cyclone Landfalling Activity in the Western North Pacific , 2004 .

[14]  Douglas Volgenau.  Hurricane Heat Potential of the Gulf of Mexico , 1972 .

[15]  Gustavo Goni,et al.  Ocean thermal structure monitoring could aid in the intensity forecast of tropical cyclones , 2003 .

[16]  M. Maltrud,et al.  Regional sea level trends due to a Pacific trade wind intensification , 2011 .

[17]  G. Vecchi,et al.  Global Projections of Intense Tropical Cyclone Activity for the Late Twenty-First Century from Dynamical Downscaling of CMIP5/RCP4.5 Scenarios , 2015 .

[18]  K. Emanuel.  Downscaling CMIP5 climate models shows increased tropical cyclone activity over the 21st century , 2013, Proceedings of the National Academy of Sciences.

[19]  P. Webster,et al.  Changes in Tropical Cyclone Number, Duration, and Intensity in a Warming Environment , 2005, Science.

[20]  J. Chan,et al.  Recent decrease in typhoon destructive potential and global warming implications , 2015, Nature Communications.

[21]  Jinbao Song,et al.  Upper ocean response to Super Typhoon Tembin (2012) explored using multiplatform satellites and Argo float observations , 2017 .

[22]  Ling-Na Wu,et al.  Observed three‐dimensional structure of ocean cooling induced by Pacific tropical cyclones , 2016 .

[23]  Chang‐Hoi Ho,et al.  Strong landfall typhoons in Korea and Japan in a recent decade , 2011 .

[24]  Sea level rise, surface warming, and the weakened buffering ability of South China Sea to strong typhoons in recent decades , 2017, Scientific Reports.

[25]  G. Holland,et al.  Tropical cyclones and climate change , 2010 .

[26]  Chun-Chieh Wu,et al.  Upper-Ocean Thermal Structure and the Western North Pacific Category 5 Typhoons. Part I: Ocean Features and the Category 5 Typhoons’ Intensification , 2008 .

[27]  Baoshu Yin,et al.  Study of storm surge trends in typhoon-prone coastal areas based on observations and surge-wave coupled simulations , 2018, International Journal of Applied Earth Observation and Geoinformation.

[28]  J. Chan.  Tropical Cyclone Activity over the Western North Pacific Associated with El Niño and La Niña Events , 2000 .

[29]  Guihua Wang,et al.  Tropical cyclone genesis over the south China sea , 2007 .

[30]  I. Lin,et al.  Recent increase in high tropical cyclone heat potential area in the Western North Pacific Ocean , 2013 .

[31]  Shang-Ping Xie,et al.  Intensification of landfalling typhoons over the northwest Pacific since the late 1970s , 2016 .

[32]  F. Jin,et al.  Eastern Pacific tropical cyclones intensified by El Niño delivery of subsurface ocean heat , 2014, Nature.

[33]  Gustavo Goni,et al.  Application of Oceanic Heat Content Estimation to Operational Forecasting of Recent Atlantic Category 5 Hurricanes , 2008 .

[34]  A. Woeikof.  Tropical cyclones. , 1884, Science.

[35]  Kerry A. Emanuel,et al.  Use of a Genesis Potential Index to Diagnose ENSO Effects on Tropical Cyclone Genesis , 2007 .

[36]  K. Emanuel.  Increasing destructiveness of tropical cyclones over the past 30 years , 2005, Nature.

[37]  J. Chan,et al.  Decadal variations of intense typhoon occurrence in the western North Pacific , 2008, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[38]  I. Lin,et al.  “Category‐6” supertyphoon Haiyan in global warming hiatus: Contribution from subsurface ocean warming , 2014 .

[39]  J. Chan,et al.  Interdecadal Variability of Western North Pacific Tropical Cyclone Tracks , 2008 .

[40]  Chunzai Wang,et al.  Seasonal modulations of different impacts of two types of ENSO events on tropical cyclone activity in the western North Pacific , 2013, Climate Dynamics.