二酸化炭素を排出する大工場も吸収する森林もないハワイのデータで、二酸化炭素量が過去最高となっていることが示された。1958年以降二酸化炭素の量が増えつづけており、その増加の割合も大きなものになってきている（過去十年の増加割合は60年代の2倍）。

http://news.bbc.co.uk/2/hi/science/nature/4395817.stm
Last Updated: Thursday, 31 March, 2005, 02:20 GMT 03:20 UK
CO2 emissions reach record levels
By David Shukman
BBC science correspondent

*Levels of the greenhouse gas carbon dioxide have reached a new high, according to US researchers.

The figures were gathered by a laboratory in Hawaii, regarded by experts as one of the most reliable in climate research.

The rise in the past year is smaller than it was in the previous two years.

But the trend remains upwards, as it has for every year since this set of measurements started near half a century ago.

Scientists at the Mauna Loa volcano laboratory found an increase in CO2 to a record level of 378 parts per million (ppm).

The research was carried out by the US government's Climate Monitoring Diagnostics Laboratory, part of the National Oceanic and Atmospheric Administration (NOAA).

*'CO2 rising since 1958'

The laboratory's director, Dr Pieter Tans, told the BBC: "The most striking thing about the data is that we've seen an increase in carbon dioxide levels every single year since 1958."

At an altitude of 3,500 metres (11,500ft), the research station must rank as the one of the world's most spectacular and most remote scientific outposts.

Reaching it involves leaving the tropical heat and humidity of the Hawaiian coast and climbing up a narrow road that twists through barren fields of solidified lava.

The thin Pacific air is ideal for this research since it is "well-mixed", meaning that there is no obvious nearby source of pollution such as a heavy industry or a natural "sink" such as forest which would absorb CO2.

For that reason the data from Mauna Loa has come to be seen as the benchmark by which atmospheric data is judged.

According to Dr Tans, one significant finding is that the annual rate at which the CO2 is rising has itself increased.

The growth rate over the past decade was about twice as fast as that found in the 1960s.

He says that variations in the growth rate year by year can be explained by natural factors, for example, changes in the rate at which plants and the oceans soak up carbon dioxide.

But he and his colleagues conclude that the steady rise overall can be attributed to man-made emissions of carbon.

Dr David Hoffman, director of NOAA's Climate Monitoring and Diagnostics Laboratory, said: "Even though man's contribution is not increasing dramatically - in fact it's steady - it is adding up, there's a cumulative increase".

In the year that the long-awaited Kyoto Treaty finally came into force, with its aim of lowering greenhouse gases, the latest evidence highlights what a challenge that will be.

　次へ 　前へ

▲このページのＴＯＰへ　　　　　 HOME > 地震・天文12掲示板

フォローアップ:

　

　

　

　

拍手はせず、拍手一覧を見る

---

★登録無しでコメント可能。今すぐ反映　通常 ｜動画・ツイッター等 ｜htmltag可（熟練者向）
（タグCheck ｜タグに'だけを使っている場合のcheck ｜checkしない）（各説明）

（←ペンネーム新規登録ならチェック）
↓ペンネーム（2023/11/26から必須）

↓パスワード（ペンネームに必須）

（ペンネームとパスワードは初回使用で記録、次回以降にチェック。パスワードはメモすべし。）
↓画像認証
（ 上画像文字を入力）
ルール確認＆失敗対策
画像の URL (任意):

投稿コメント全ログ 　コメント即時配信 　スレ建て依頼 　削除コメント確認方法

---

★阿修羅♪　http://www.asyura2.com/ 　since 1995
　題名には必ず「阿修羅さんへ」と記述してください。
掲示板,ＭＬを含むこのサイトすべての
一切の引用、転載、リンクを許可いたします。確認メールは不要です。
引用元リンクを表示してください。