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Data Structure ?
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Data Structure ?
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README.md
**# 気候変動**
過去1世紀にわたって地球の平均気温が上昇していることを記録した多くの研究があります。地球の平均気温が上昇し続けると、深刻な結果をもたらします。海面上昇と極端な気象現象の頻度の増加は、何十億人もの人々に影響を与えます。
この問題では、地球の平均気温と他のいくつかの要因との関係を調査しようとします。
ファイル climate_change.csv には、1983年5月から2008年12月までの気候データが含まれています。利用可能な変数は以下の通りです。
・Year:観測年。
・Month:観測月。
・Temp:その期間の地球の平均気温と基準値との摂氏度数の差。これが従属変数です。
・CO2、N2O、CH4、CFC.11、CFC.12:それぞれ二酸化炭素(CO2)、亜酸化窒素(N2O)、メタン(CH4)、トリクロロフルオロメタン(CCl3F;一般にCFC - 11と呼ばれる)、ジクロロジフルオロメタン(CCl2F2;一般にCFC - 12と呼ばれる)の大気中濃度。
・CO2、N2O、CH4はppmv(体積百万分率 - つまり、CO2が397ppmvとは、CO2が大気の総体積の39700万分の1を占めることを意味します)で表されます。
・CFC.11とCFC.12はppbv(体積十億分率)で表されます。
・Aerosols:550nmにおける成層圏エアロゾルの平均光学的厚さ。この変数は火山と関連しており、火山噴火によって大気中に新しい粒子が加わり、太陽エネルギーのどれだけが宇宙に反射されるかに影響を与えます。
・TSI:全太陽放射量(TSI)(W/m2 ;単位面積あたりに太陽から供給されるエネルギーの割合)。太陽黒点や他の太陽現象のため、太陽から放出されるエネルギーの量は時間とともに大きく変化します。
・MEI:多変量エルニーニョ南方振動指数(MEI)。エルニーニョ/ラニーニャ - 南方振動(地球の気温に影響を与える太平洋の気象現象)の強さを測定したもの。
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