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Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 35

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 107

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 109

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 111

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 112

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/link-template.php on line 113

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/link-template.php on line 138

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 35

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 107

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 109

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 111

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 112

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/link-template.php on line 113

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/link-template.php on line 138

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 35

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 107

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 109

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 111

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 112

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/link-template.php on line 113

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Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 35

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 43

Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 35

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/functions.php on line 43

Nível do mar pode subir até 2,3 m para cada 1 ºC de aquecimento

Segunda-feira, 15 de Julho de 2013

Fonte: G1

groenlandia

Imagem mostra corredeira no meio de calota polar na Groenlândia em 4 de julho de 2012 (Foto: Ian Joughin/AP)

A cada aumento de 1 ºC na temperatura do planeta, o nível do mar poder subir 2,3 metros e permanecer elevado por séculos, de acordo com um novo estudo divulgado nesta segunda-feira (15) pelo Instituto Potsdam de Pesquisa sobre Impacto no Clima, da Alemanha.

De acordo com Anders Levermann, um dos autores da pesquisa, ela é a primeira a examinar evidências da história do clima e combiná-las com simulações de computador de fatores que contribuem para a elevação do nível do mar a longo prazo: a expansão termal de oceanos, o derretimento de geleiras nas montanhas e o degelo na Groenlândia e Antártica.

Cientistas afirmam que o aquecimento global é responsável pelo derretimento do gelo. O Painel Intergovernamental sobre Mudanças Climáticas (IPCC, ligado à ONU) diz que gases de efeito estufa provenientes da queima de combustíveis fósseis estão empurrando as temperaturas para cima.

Um pequeno número de cientistas não considera que o aquecimento global seja resultado da interferência humana, pois argumentam que essa mudança decorre de flutuações naturais no clima do planeta.

“Estamos confiantes que nossa estimativa seja sólida por causa da combinação da física com as informações que usamos”, disse Levermann. “Achamos que estabelecemos pontos de referência sobre quanto o nível do mar vai subir com os aumentos de temperatura.”

Mares mais altos
O nível do mar subiu cerca de 17 centímetros no século passado e o ritmo tem acelerado em mais de 3 milímetros por ano, segundo o IPCC. Um terço da atual elevação provém da Antártica e da Groenlândia.

A temperatura média da superfície do planeta subiu cerca de 0,8 ºC desde a Revolução Industrial e o IPCC afirma que as temperaturas provavelmente vão ficar de 0,4 ºC a 1 ºC mais altas entre 2016 a 2035, em comparação com as décadas de 1985 a 2005.

“Antes havia alguma incerteza e as pessoas não sabiam quanto (seria o aquecimento)”, comentou Levermann. “Agora, nós estamos dizendo, considerando tudo o que sabemos, que temos uma sólida estimativa de 2,3 metros de elevação do mar para cada grau de aquecimento”, complementa.

Alguns estudos específicos projetaram a elevação do nível do mar para cerca de 2 metros até 2100, uma cifra que resultaria no alagamento de amplas porções de terra, em lugares como Bangladesh e o Estado americano da Flórida, por exemplo.

Para conter tais estragos, cerca de 200 governos concordaram em limitar o aquecimento global para menos de 2 ºC acima da era pré-industrial e planejam entrar em acordo, até o fim de 2015, sobre um tratado para conter emissões de gases.

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Warning: strtotime() [function.strtotime]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/link-template.php on line 113

Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Sao_Paulo' for 'BRT/-3.0/no DST' instead in /home/storage/7/5b/77/seashepherd/public_html/blog/wp-includes/link-template.php on line 138
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