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	<title>Perquè el cel és blau</title>
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	<description>i els núvols són blancs?</description>
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		<title>Perquè el cel és blau</title>
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		<title>Nova experiència: Finlandia!</title>
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		<pubDate>Thu, 19 Jan 2012 16:15:38 +0000</pubDate>
		<dc:creator>Costa M.</dc:creator>
				<category><![CDATA[2. Recerca]]></category>

		<guid isPermaLink="false">http://arweenn.wordpress.com/?p=1620</guid>
		<description><![CDATA[Properament tindré la oportunitat de fer una estada breu gràcies a una beca del Ministeri a la seu central de l&#8217;empresa VAISALA a Vantaa, a pocs kilòmetres de Helsinki. Vaisala és una empresa líder mundial en mesuraments ambientals i industrials. Amb més de 70 anys d&#8217;experiència,  segons la seva web, Vaisala contribueix a millorar la [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=arweenn.wordpress.com&amp;blog=6530390&amp;post=1620&amp;subd=arweenn&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Radiació nuclear: invisible i inodora, però devastadora!</title>
		<link>http://arweenn.wordpress.com/2012/01/07/radiacio-nuclear-invisible-i-inodora-pero-devastadora/</link>
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		<pubDate>Sat, 07 Jan 2012 19:13:54 +0000</pubDate>
		<dc:creator>Costa M.</dc:creator>
				<category><![CDATA[ciència]]></category>

		<guid isPermaLink="false">http://arweenn.wordpress.com/?p=1552</guid>
		<description><![CDATA[Us escric aquesta entrada en el blog sobre la radiació nuclear perquè precisament, aquest any passat, vaig estar vivint i treballant uns mesos a Richland (WA, EUA) gràcies a una beca del Ministeri per fer una estada breu en un centre de recerca de l&#8217;estranger, i resulta que és la ciutat americana on es va [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=arweenn.wordpress.com&amp;blog=6530390&amp;post=1552&amp;subd=arweenn&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Les Dracònides: pluja d&#8217;estels del 8 d&#8217;octubre</title>
		<link>http://arweenn.wordpress.com/2011/10/10/pluja-destels-del-8-doctubre/</link>
		<comments>http://arweenn.wordpress.com/2011/10/10/pluja-destels-del-8-doctubre/#comments</comments>
		<pubDate>Mon, 10 Oct 2011 13:15:53 +0000</pubDate>
		<dc:creator>Costa M.</dc:creator>
				<category><![CDATA[Avís]]></category>
		<category><![CDATA[ciència]]></category>
		<category><![CDATA[Popular]]></category>

		<guid isPermaLink="false">http://arweenn.wordpress.com/?p=1599</guid>
		<description><![CDATA[Tal i com havien anunciat els mitjans de comunicació, durant el vespre-nit del dissabte 08/10/11 vam poder disfrutar d&#8217;una pluja d&#8217;estels (o pluja d&#8217;estrelles) si fixàvem la vista cap al cel en direcció al Nord -  Nord-oest. Les pluges d&#8217;estels es produeixen quan l&#8217;òrbita de la Terra es creua amb els núvols de partícules que [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=arweenn.wordpress.com&amp;blog=6530390&amp;post=1599&amp;subd=arweenn&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">arwen</media:title>
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		<title>Dust Devils</title>
		<link>http://arweenn.wordpress.com/2011/08/19/dust-devils/</link>
		<comments>http://arweenn.wordpress.com/2011/08/19/dust-devils/#comments</comments>
		<pubDate>Fri, 19 Aug 2011 13:26:33 +0000</pubDate>
		<dc:creator>Costa M.</dc:creator>
				<category><![CDATA[ciència]]></category>

		<guid isPermaLink="false">http://arweenn.wordpress.com/?p=1588</guid>
		<description><![CDATA[Durant la estada que vaig poder gaudir a Richalnd (WA) vaig observar un fenòmen que també havia pogut observar aquí a Catalunya però no de la mateixa magnitud. Per sort vaig poder captar-ne unes fotos, no són de gaire qualitat, ja que les vaig fer a corre cuita des de dins el cotxe, però n&#8217;estic [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=arweenn.wordpress.com&amp;blog=6530390&amp;post=1588&amp;subd=arweenn&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">arwen</media:title>
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		<title>Punching Holes in the Sky / Els forats de perforació en el cel (NASA)</title>
		<link>http://arweenn.wordpress.com/2011/07/16/punching-holes-in-the-sky-els-forats-de-perforacio-en-el-cel-nasa/</link>
		<comments>http://arweenn.wordpress.com/2011/07/16/punching-holes-in-the-sky-els-forats-de-perforacio-en-el-cel-nasa/#comments</comments>
		<pubDate>Sat, 16 Jul 2011 10:37:46 +0000</pubDate>
		<dc:creator>Costa M.</dc:creator>
				<category><![CDATA[ciència]]></category>

		<guid isPermaLink="false">http://arweenn.wordpress.com/?p=1572</guid>
		<description><![CDATA[Els científics, fotògrafs i aficionats a l&#8217;observació dels núvols han estat buscant intensament la causa de la formació dels forats de perforació en els núvols durant dècades. Aquests, són espais gegants que apareixen a la coberta dels núvols. N&#8217;hi ha que presenten formes belles, però alhora són també una oportunitat per a la investigació científica. [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=arweenn.wordpress.com&amp;blog=6530390&amp;post=1572&amp;subd=arweenn&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">arwen</media:title>
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		<title>El satélite &#8216;CryoSat&#8217; realiza sus primeros mapas de los hielos polares</title>
		<link>http://arweenn.wordpress.com/2011/06/23/el-satelite-cryosat-realiza-sus-primeros-mapas-de-los-hielos-polares/</link>
		<comments>http://arweenn.wordpress.com/2011/06/23/el-satelite-cryosat-realiza-sus-primeros-mapas-de-los-hielos-polares/#comments</comments>
		<pubDate>Thu, 23 Jun 2011 08:32:31 +0000</pubDate>
		<dc:creator>Costa M.</dc:creator>
				<category><![CDATA[ciència]]></category>

		<guid isPermaLink="false">http://arweenn.wordpress.com/?p=1566</guid>
		<description><![CDATA[El radar mide la altura capa helada que sobresale del agua Los científicos del satélite Cryosat han presentado en el certamen aeroespacial de Le Bourget (Francia) el primer mapa del grosor de toda la región Ártica obtenido con los datos que ha tomado el artefacto en órbita en el primer trimestre del año. Con su [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=arweenn.wordpress.com&amp;blog=6530390&amp;post=1566&amp;subd=arweenn&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">arwen</media:title>
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			<media:title type="html">El </media:title>
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		<title>Espectacular erupció del volcà islandès Grimsvötn.</title>
		<link>http://arweenn.wordpress.com/2011/05/24/espectacular-erupcio-del-volca-islandes-grimsvotn/</link>
		<comments>http://arweenn.wordpress.com/2011/05/24/espectacular-erupcio-del-volca-islandes-grimsvotn/#comments</comments>
		<pubDate>Tue, 24 May 2011 18:16:07 +0000</pubDate>
		<dc:creator>Costa M.</dc:creator>
				<category><![CDATA[Avís]]></category>

		<guid isPermaLink="false">http://arweenn.wordpress.com/?p=1529</guid>
		<description><![CDATA[Algunes aerolinies que operen al Regne Unit han anunciat que cancelaran tots o gairebé tots els vols programats pel dimarts per la previsió de que apareixi cendra del volcà islandès Grimsvötn, el qual va entrar en erupció el passat dissabte, a l&#8217;espai aeri escocès. La freqüència i temporalitat amb la què els volcans entren en [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=arweenn.wordpress.com&amp;blog=6530390&amp;post=1529&amp;subd=arweenn&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">arwen</media:title>
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		<title>Bye Bye Comet!</title>
		<link>http://arweenn.wordpress.com/2011/05/15/bye-bye-comet/</link>
		<comments>http://arweenn.wordpress.com/2011/05/15/bye-bye-comet/#comments</comments>
		<pubDate>Sun, 15 May 2011 16:41:04 +0000</pubDate>
		<dc:creator>Costa M.</dc:creator>
				<category><![CDATA[ciència]]></category>

		<guid isPermaLink="false">http://arweenn.wordpress.com/?p=1543</guid>
		<description><![CDATA[Vídeo capturat per la NASA entre el 10 i 11 de maig del 2011: El SOHO va observar com un cometa força brillant s&#8217;aproximava cap al Sol i no es va tornar a veure fins a la seva aproximació i trobada amb el Sol (10 a 11 maig 2011). El cometa, probablement part de la [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=arweenn.wordpress.com&amp;blog=6530390&amp;post=1543&amp;subd=arweenn&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Anatomia d&#8217;un tornado assassí</title>
		<link>http://arweenn.wordpress.com/2011/05/15/anatomia-dun-tornado-assassi/</link>
		<comments>http://arweenn.wordpress.com/2011/05/15/anatomia-dun-tornado-assassi/#comments</comments>
		<pubDate>Sun, 15 May 2011 07:47:03 +0000</pubDate>
		<dc:creator>Costa M.</dc:creator>
				<category><![CDATA[ciència]]></category>
		<category><![CDATA[Popular]]></category>

		<guid isPermaLink="false">http://arweenn.wordpress.com/?p=1523</guid>
		<description><![CDATA[Als Estats Units es coneixen com a &#8220;killer tornadoes&#8221; (tornados assassins) per la seva capacitat de destrucció. L&#8217;última onada de tornados d&#8217;aquest tipus als Estats Units, al sud, ha deixat més de 300 morts. Les tècniques de predicció i alerta han millorat en els darrers 50 anys, però el fenomen encara segueix sent impredictible. Científics [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=arweenn.wordpress.com&amp;blog=6530390&amp;post=1523&amp;subd=arweenn&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">arwen</media:title>
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		<title>Effect of cloud-scattered sunlight on earth&#8217;s energy balance depends on wavelength of light</title>
		<link>http://arweenn.wordpress.com/2011/05/04/effect-of-cloud-scattered-sunlight-on-earths-energy-balance-depends-on-wavelength-of-light/</link>
		<comments>http://arweenn.wordpress.com/2011/05/04/effect-of-cloud-scattered-sunlight-on-earths-energy-balance-depends-on-wavelength-of-light/#comments</comments>
		<pubDate>Wed, 04 May 2011 02:17:30 +0000</pubDate>
		<dc:creator>Costa M.</dc:creator>
				<category><![CDATA[2. Recerca]]></category>
		<category><![CDATA[ciència]]></category>

		<guid isPermaLink="false">http://arweenn.wordpress.com/?p=1519</guid>
		<description><![CDATA[Accounting for wavelength effects will likely improve climate models RICHLAND, Wash. – Atmospheric scientists trying to pin down how clouds curb the amount of sunlight available to warm the earth have found that it depends on the wavelength of sunlight being measured. This unexpected result will help researchers improve how they portray clouds in climate [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=arweenn.wordpress.com&amp;blog=6530390&amp;post=1519&amp;subd=arweenn&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">arwen</media:title>
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			<media:title type="html">Cloudy Dissonance</media:title>
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