tag:blogger.com,1999:blog-11334150.post5493387335257339978..comments2023-10-26T15:13:35.238+01:00Comments on Esquerda Republicana: Emissões de CO2 e a acidificação dos oceanosRicardo Alveshttp://www.blogger.com/profile/03801903003049105480noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-11334150.post-14362703266540627572010-10-18T22:53:29.681+01:002010-10-18T22:53:29.681+01:00LEIA ESTE ARTIGO
Hà uns tempos andava de graça na ...LEIA ESTE ARTIGO<br />Hà uns tempos andava de graça na net <br />presumo que continue<br />o autor não se compromete<br />com nenhum fundamentalismo<br />e faz uma análise sólida...<br /><br />Organic<br />compounds of intermediate carbon chain length, C4-C7, (of intermediate solubility and<br />melting temperatures) nucleated ice at the same temperature as aqueous sulfuric acid<br />20 aerosols. Interpretations and implications of these results for cirrus cloud formation are<br />discussed.<br />1 Introduction<br />Cirrus clouds, composed of water ice, form in the upper troposphere and are generally<br />thought to have an overall warming effect at the Earth’s surface. Since the occurrence<br />25 of cirrus has increased beyond that attributable to aviation effects over the last few<br />decades (Fahey and Schumann, 1999), changes in other anthropogenically produced<br />2060<br />aerosols could be another factor responsible for this increase. A more complete understanding<br />of the critical factors involved in ice nucleation is needed to better model<br />cirrus formation in the upper troposphere and its impact on climate. Sulfate aerosols,<br />ubiquitous throughout the upper troposphere, are known to be important in the formation<br />of cirrus clouds. Several 5 laboratory studies, using a variety of techniques, have<br />established homogeneous ice nucleation conditions for aqueous sulfuric acid aerosols<br />over the tropospherically relevant concentration range (<40 wt% H2SO4) (Bertram et<br />al., 1996; Koop et al., 1998; Chen et al., 2000; Cziczo and Abbatt, 2001; Prenni et<br />al., 2001b). There is much less data available for ice nucleation from other inorganic<br />10 and organic speciesANTÓNIO DA CEREJEIRA SALAZAR https://www.blogger.com/profile/14331555659724439860noreply@blogger.comtag:blogger.com,1999:blog-11334150.post-27554720999757000322010-10-18T22:46:59.424+01:002010-10-18T22:46:59.424+01:00ultrapassem os 1000 Pg (10 potência de 9 tons)
10...ultrapassem os 1000 Pg (10 potência de 9 tons) <br />1000 Gigatones?<br />em 50 anos<br />20 gigatones ano de carbono<br />sim é o actual<br />no período entre 2000 e 2049. <br /><br />O artigo alerta também que o excesso de CO2 reduz a produção de gases marinhos que contribuem para<br />a nucleação nas nuvens <br />mas com mais calor a evaporação suplementar trata disso<br />a altitudes elevadas<br />Cirrus clouds form by the homogenous freezing of liquid droplets, by heterogeneous<br />60 nucleation of ice on ice nuclei, and the subsequent grow of ice crystals [Pruppacher and<br />61 Klett, 1997].<br /> <br /> A formação de menos nuvens diminui o poder de reflexão da radiação solar, amplificando o aquecimento global <br />Concerns have been raised<br />54 on the effect of aircraft emissions [Penner, et al., 1999; Minnis, 2004; Stuber, et al.,<br />55 2006; IPCC, 2007] and long-range transport of pollution [Fridlind, et al., 2004] changing<br />56 the properties of upper tropospheric clouds, i.e., cirrus and anvils,<br />há tantos efeitos em causa<br /><br />a afirmação é simplista<br />através de um efeito de realimentação positiva. Perante estes resultados, <br /><br />QUAIS RESULTADOS????<br />BANALIDADES <br />ISTO SÃO ..enfimANTÓNIO DA CEREJEIRA SALAZAR https://www.blogger.com/profile/14331555659724439860noreply@blogger.com