Portal field news

Portal field news


🏛 | Can we stop global warming before the trigger of further abnormal weather is triggered? The world is now at a major crossroads.


Can global warming be stopped before the trigger of further abnormal weather is triggered? The world is now at a major crossroads International ...

If you write the contents roughly
The abnormal weather that is occurring all over the world is still the "starting point", and if global warming continues as it is, record-breaking phenomena such as record highs will frequently occur, and the situation will be even more triggering. He warned that the world is at a major crossroads in front of it to stop global warming.

Three experts who look at global environmental issues from various angles said that the new administration of Biden in the United States returned to the Paris Agreement, and ... → Continue reading

 The Genron NPO

Genron NPO is a private-sector-led, neutral and independent think tank that crosses national borders and collaborates with many knowledgeable people around the world. Since its founding in 2001, it has continued to provide a "stage of speech" that confronts Japan's democracy and future challenges by connecting people who are active on the front lines of various fields in Japan.And, in collaboration with the world's major think tanks and many knowledge groups, we are creating a new flow to confront various difficulties in the world and Asia.

Wikipedia related words

If there is no explanation, there is no corresponding item on Wikipedia.

More than now

    Abnormal weather

    Abnormal weather(Ijokisho) is abnormalhigh temperature-(I.e.-sunshineShortageCold summerUnusual such asweatherIs the general term for.

    Definition of extreme weather


    Japan OfJapanese Meteorological AgencyThen,Last two years Ofclimate"Weather that shows a significant bias against" is defined as abnormal weather.World Meteorological OrganizationThe definition of abnormal weather is "a phenomenon in which the average temperature and precipitation are significantly biased from normal, and the deviation occurs only once every 25 years or more."

    エ ル ニ ー ニ ョPhenomenon and thisSouthern vibrationIncludingENSOIs said to cause extreme weather, but El Nino /La NiñaThe phenomenon occurs in a cycle of several years,It is not "El Nino / La Nina phenomenon = abnormal weather".As will be described later, the cause of abnormal weather is neither El Nino / La Nina (regardless of whether El Nino / La Nina is included or not, various conditions occur in a complex and complex manner). In addition, according to the Japan Meteorological Agency's Extreme Weather Report, "Phenomena that deviate significantly from the phenomena experienced in the past and are rarely experienced by humans in their lifetime (occurred about once in the past few decades)."(Japan Meteorological Agency: Extreme Weather Report)I am also

    "Abnormal weather" isEnglishIt is almost synonymous with "extreme weather", "unusual weather", "abnormal weather", and "anomalous weather", and is considered to be the concept of extreme weather and rare weather.

    However, the occurrence of abnormal weather itself is a natural event, and地球As long as there is, a certain amount is always generated.simplyA human OflifeIs about 100 years, and the literature related to modern meteorology is only about 100 to 1000 years in the past, so even if the weather is originally "normal" on the earth, it is an observer. Human life ・HistoryIt can be said that it was defined as "abnormal" for.

    Extreme weather and time scale

    The cycle of natural fluctuations varies, and the cycle of one daySolar radiationFrom (daily fluctuation of temperature) to seasonal change, the sun with a cycle of more than XNUMX yearsBlack dotActivity, hundreds of thousands of yearsMilankovitch cycleUp to. In addition, there are various cycles of climate change on a global and regional scale, ranging from days to hundreds of thousands of years.

    Those with long or short cycles do not meet the criteria for abnormal weather, which is "once every 30 or 25 years", and are subject to fluctuations.(I.e.,valleyWhen it is in, even if it is abnormal weather from the present, it may not be abnormal weather in the situation at that time.From these things, the judgment of whether or not the weather is abnormal depends greatly on the ruler (time scale) used at that time.

    Various extreme weather

    The following phenomena, to varying degrees, are generally considered to be extreme weather events.

    other than this,Seasonal phenomenonIt is also one of the abnormal weather that the time of the event is greatly deviated.Chuxue,Freezing(First ice),First snow,First in spring,Rainy season such asPhysical chemistryPhenomenon, of courseAutumn leaves,Flowering, First cry, first look,hibernation such asBiochemistryPhenomenon (Phenological observation) Is also included.

    The following phenomena are usually possible weather, but they are abnormal weather depending on changes in power, increase / decrease, and bias of course.

    Causes of extreme weather

    Most of what is considered to be extreme weatherMeteorological disturbanceHowever, as the weather changes from moment to moment as it develops and degenerates in the global flow, adverse conditions overlap, and it is a sudden phenomenon caused by the action of natural fluctuations. But artificialClimate change,Heat islandIt has been pointed out that the local climate such as is related to abnormal weather. There are many other causes of extreme weather. Factors of abnormal weather (triggers, phenomena that enhance or reduce abnormal weather) are listed below.

    Increased extreme weather

    20st centuryIt is said that from around that time, industrialization and civilization progressed rapidly, and abnormal weather began to occur frequently. However, the cause of the increase is not only due to the increase in abnormal weather itself, but also due to the increase.communicationDue to the development and development of technology, many extreme weather events have been reported.populationIncreasepoverty,BuildingIncreased risk of disasters caused by abnormal weather due to the longevity ofknowledgeThe spread ofMeteorologyIs also a factor. Changes in the activity of the sun also have a huge impact on the Earth's climate.

    Climate modelAccording to estimates, extreme weather events will increase in the next few decades to hundreds of years due to global warming. But,Ice ageThere is also a study that the temperature difference between low latitude and high latitude was large, and there were more abnormal weather than at present.

    TypicallyPaleoclimatologyAccording to the report, the temperature difference between the polar regions and the equator becomes smaller during the global warm season and the meteorological phenomenon becomes milder, while the temperature difference becomes larger and the meteorological phenomenon becomes more severe during the cold season. However, warm and cold seasons often occur locally, in which case exceptions occur. However, the estimation of the severity of meteorological phenomena is not yet accurate, and there are some disagreements.

    In addition, there is a tendency to investigate the causes (artificial factors, especially the relevance of global warming) of each abnormal weather such as warm winters and intense heat, local thunderstorms and gusts, and strong typhoons. Westerly bias, wide-area temperature and seawater temperature bias, El Nino, etc.Atmospheric fluctuationCan be cited as an indirect factor, but estimating whether it is caused by global warming is a matter of meteorology.カ オ スThere is a very difficult part in terms of sex. Few can clearly say that it is related to global warming, and most of them are only "I don't know."

    on the other hand,Heat island phenomenon,DesertificationThe effects on the weather are relatively clear, and it can be presumed to be the cause of abnormal weather. It should be noted that2015Was the year when the world's average temperature reached a record high[1].

    Extreme weather observations and statistics

    Global Extreme Weather Monitoring Bulletin

    Every Wednesday, the Japan Meteorological Agency announces the status of abnormal weather and meteorological disasters in the world that occurred in the week up to the previous day.The definition of extreme weather in this is

    • Abnormally high / low temperature The difference from the average weekly average temperature is more than 1 times the standard deviation in the same month.
    • Unusually heavy rainfall Weekly rainfall exceeds normal monthly rainfall
    • Abnormal light rainfall During the same period, the amount of precipitation for the previous 30 days1971~2000The least among (except for some dry areas)
    • Tropical cyclone
    • Other weather disasters

    It has become.

    Extreme weather report

    The Meteorological Agency1974We have compiled an abnormal weather report every 5 years since then.The content is a summary of recent weather observations and future forecasts, taking into account the long-term climate of Japan and the world.

    Response and preparation for abnormal weather

    Responses to abnormal weather are almost the same as responses to "severe weather," "stormy weather," and "bad weather," and are often equated. It is often done collectively as a response to so-called meteorological disasters.

    In companies and organizationsRisk management,Risk AssessmentBy weather disasterriskTo reduce. In anticipation of damage caused by weather disastersWeather derivativesThere is also a financial derivative product called.

    However, there is a strong view that "abnormal weather" can increase in the future due to global warming, etc., and preparations are being made for "increased abnormal weather" and "increased risk of abnormal weather".Central disaster prevention conferenceIn many cases, measures are taken by field, such as the "Special Investigation Committee on Large-Scale Flood Control".



    1. ^ https://www.gizmodo.jp/2016/01/2015_hottestyear.html 2015 was the hottest year on record

    Related item

    外部 リンク


    Back to Top