Het Grote Klimaatverandering Topic #3 De ondergang van Heartland

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Op vrijdag 26 juli 2013 14:40 schreef MrMofo het volgende:
Wat voor een effect heeft het zwakker worden van ons magnetisch veld op het klimaat?

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A typical headline: "Is Earth's magnetic field collapsing?"

Probably not. As remarkable as these changes sound, "they're mild compared to what Earth's magnetic field has done in the past," says University of California professor Gary Glatzmaier.

Sometimes the field completely flips. The north and the south poles swap places. Such reversals, recorded in the magnetism of ancient rocks, are unpredictable. They come at irregular intervals averaging about 300,000 years; the last one was 780,000 years ago. Are we overdue for another? No one knows.

According to Glatzmaier, the ongoing 10% decline doesn't mean that a reversal is imminent. "The field is increasing or decreasing all the time," he says. "We know this from studies of the paleomagnetic record." Earth's present-day magnetic field is, in fact, much stronger than normal. The dipole moment, a measure of the intensity of the magnetic field, is now [..] twice the million-year average [..].

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Op vrijdag 26 juli 2013 13:13 schreef Norrage het volgende:
http://action.sumofus.org/a/google-climate-deniers/2/3/?sub=fb

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Op vrijdag 2 augustus 2013 11:07 schreef Eyjafjallajoekull het volgende:
Ik heb steeds meer zoiets van, laat die Amerikanen maar in hun eigen sop gaarkoken.

Veel amerikanen willen niet dat er belastingcenten besteed worden aan grote projecten zoals dijken of deltawerken achtige zaken. Dan moeten grote bedrijven maar doen. Tsja... Zelfs nadat half NY een paar maanden geleden onder water stond wordt er niks gedaan.

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Op vrijdag 2 augustus 2013 13:41 schreef barthol het volgende:

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Gaat het over Amerikanen? Het artikel was geplaatst in the Guardian, en eigenlijk een quote van een blogpost van Tamsin Edwards die klimaatwetenschapper is aan de universiteit van Bristol en daarnaast blogt op plos.org.

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Op vrijdag 2 augustus 2013 13:55 schreef Eyjafjallajoekull het volgende:

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Ah, ik zocht al. Maar het geld dan meer voor de gehele wereld wellicht

Climate Change Interview with Pieter Tans - Part 1

Climate Change Interview with Pieter Tans - Part 2

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Human induced climate change requires urgent action.

Humanity is the major influence on the global climate change observed over the past 50 years.
Rapid societal responses can significantly lessen negative outcomes.

Human activities are changing Earth’s climate. At the global level, atmospheric concentrations of carbon dioxide and other heat trapping greenhouse gases have increased sharply since the Industrial Revolution. Fossil fuel burning dominates this increase. Human caused increases in greenhouse gases are responsible for most of the observed global average surface warming of roughly 0.8°C (1.5°F) over the past 140 years. Because natural processes cannot quickly remove some of these gases (notably carbon dioxide) from the atmosphere, our past, present, and future emissions will influence the climate system for millennia.

Extensive, independent observations confirm the reality of global warming. These observations show large scale increases in air and sea temperatures, sea level, and atmospheric water vapor; they document decreases in the extent of mountain glaciers, snow cover, permafrost, and Arctic sea ice. These changes are broadly consistent with long understood physics and predictions of how the climate system is expected to respond to human caused increases in greenhouse gases. The changes are inconsistent with explanations of climate change that rely on known natural influences.

Climate models predict that global temperatures will continue to rise, with the amount of warming primarily determined by the level of emissions. Higher emissions of greenhouse gases will lead to larger warming, and greater risks to society and ecosystems. Some additional warming is unavoidable due to past emissions.

Climate change is not expected to be uniform over space or time. Deforestation, urbanization, and particulate pollution can have complex geographical, seasonal, and longer term effects on temperature, precipitation, and cloud properties. In addition, human induced climate change may alter atmospheric circulation, dislocating historical patterns of natural variability and storminess.

In the current climate, weather experienced at a given location or region varies from year to year; in a changing climate, both the nature of that variability and the basic patterns of weather experienced can change, sometimes in counterintuitive ways -- some areas may experience cooling, for instance. This raises no challenge to the reality of human induced climate change.

Impacts harmful to society, including increased extremes of heat, precipitation, and coastal high water are currently being experienced, and are projected to increase. Other projected outcomes involve threats to public health, water availability, agricultural productivity (particularly in low latitude developing countries), and coastal infrastructure, though some benefits may be seen at some times and places. Biodiversity loss is expected to accelerate due to both climate change and acidification of the oceans, which is a direct result of increasing carbon dioxide levels.

While important scientific uncertainties remain as to which particular impacts will be experienced where, no uncertainties are known that could make the impacts of climate change inconsequential. Furthermore, surprise outcomes, such as the unexpectedly rapid loss of Arctic summer sea ice, may entail even more dramatic changes than anticipated.

Actions that could diminish the threats posed by climate change to society and ecosystems include substantial emissions cuts to reduce the magnitude of climate change, as well as preparing for changes that are now unavoidable. The community of scientists has responsibilities to improve overall understanding of climate change and its impacts. Improvements will come from pursuing the research needed to understand climate change, working with stakeholders to identify relevant information, and conveying understanding clearly and accurately, both to decision makers and to the general public.

Adopted by the American Geophysical Union
December 2003; Revised and Reaffirmed December 2007, February 2012, August 2013.

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Op woensdag 25 september 2013 14:32 schreef Norrage het volgende:
IPCC Rapport dat er voor zorgt dat wetenschappers minder echt relevant onderzoekkunnen doen

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Op vrijdag 27 september 2013 11:24 schreef cynicus het volgende:
Ladies and gentlemen, het eerste deelrapport van het IPCC (AR5 WG1) is uit.

Summary for Policymakers

Het volledige rapport

De openings sessie:

IPCC AR5 WGI Opening Session

Veel leesplezier

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Op vrijdag 27 september 2013 11:30 schreef Felagund het volgende:

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Volledige rapport wordt pas maandag beschikbaar. Vandaag alleen de samenvatting voor beleidsmakers.

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Op vrijdag 27 september 2013 15:28 schreef Norrage het volgende:
Weerman Peter met een duidelijk verhaal over de belangrijkste IPCC conclusies:
http://nos.nl/audio/55594(...)n-82-cm-stijgen.html

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Op vrijdag 27 september 2013 18:51 schreef cynicus het volgende:

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Grappig, ik ken Peter als onderzoeker van de Antarctische cryosfeer maar wist niet dat hij als weerman aan de NOS was verbonden. Goed en helder verhaal inderdaad.

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