by
Middelalderens globale varmeperiode
- mai 7, 2021
- 20:35
- Geir Aaslid
- Kategorier: Klimapolitikk
Forfattet av Olav Thorsen.
Det finnes en rekke paleoklimatiske arbeid fra hele verden som tegner et tydelig bilde av «middelalderens varmeperiode» som et globalt fenomen. Bildet er hentet herfra og hvor hver graf i referansen lenker videre til forskjellige paleoklimatiske undersøkelser fra hele verden. Disse undersøkelsene kan brukes som støtte til det vitenskapelige synet på «middelalderens varmeperiode» som et globalt fenomen, og som sannsynligvis var varmere enn i dag.
Videre anbefales også Medieval Warm Period Project. Dette er en god portal for oversikt over tallrike paleoklimatiske studier som støtter det lenge etablerte synet om en global varmeperiode i middelalderen.
Et fagfelt undergraves av en politisk agenda
Frem til 90-tallet hadde man en upresset ekte konsensus rundt vårt klima de siste gode tusen år. Det etablerte synet var en temperaturstigning inn i en varmeperiode i vår middelalder, tidsrom ca. år 900-1300 CE. Denne perioden er kjent som «middelalderens varmeperiode», et syn som ble etablert av en tidlig bauta innen paleoklimatologi og klimavitenskap, Hubert Lamb. [B Lewin, 2015] Etter denne kom en kuldeperiode kjent som «den lille istid», tidsrom ca. år 1400-1800 CE. Ifra år 1800 og utover startet en lang stigende temperaturtrend som naturlig konsekvens av en markert kuldeperiode. Denne temperaturstigningen ble fremmet som hovedårsaken til global oppvarming frem til 1950 av forrige generasjons proponenter for menneskeskapt global oppvarming.
På 90-tallet skjedde det en stor endring i synet på lengre klimaperioder. En velkjent svindel, Michael Manns hockey stick, [M Steyn, 2015] [A W Montford, 2011] ble over natten fremmet som vitenskapens oppdaterte syn på vår litt lengre temperaturhistorie. Et helt forskningsfelt, paleoklimatologi, og en eksisterende upresset vitenskapelig konsensus, ble over natten tilsidesatt i dette politiske budskapet. I denne fremstillingen var både «middelalderens varmeperiode» og «den lille istid» fjernet fra en global temperaturhistorikk. De ble i et politisert budskap redusert til kun lokale fenomener i Europa og Nord-Amerika. Dette skjedde samtidig med at det politiserte budskapet fremstilte en meget aggressiv temperaturøkning siden midten av 1800-tallet.
Sinusoidal variasjon mot menneskeskapt oppvarming
Det er påfallende hvor forskjellig formen på temperaturhistorikk er hos IPCC i år 1990 kontra år 2001. [N Sauer, 2015] I den ene har man en noenlunde sinusoidal form med en høy topp rundt år 1200, en bunn rundt år 1650, og en stigning siden den gang med utflating inn mot år 1990.
Utflating var garantert påvirket av det tidligere etablerte synet om at global temperatur sank en god del fra 1940-1970. Det er ikke utenktelig at forskere i 1970 hadde bedre kontroll på en temperaturtrend de siste 30 år enn den siste generasjonens repeterende «homogenisering» av historiske temperaturdata. Klimavitenskapen var en seriøs disiplin med godt fokus på metodikk den gang. Klimaalarmismens metode, hvor man flerfoldige ganger endrer historiske måledata retroaktivt, har nesten utelukkende fremstilt stadig mer langvarig oppvarming i vår nyere tid. [T Heller, 2017]
Det er også påfallende at synet i 1990 hos IPCC var en «middelalderens varmeperiode» klart varmere enn i 1990. Nå har vi blitt litt varmere siden 1990, men det er fremdeles slik, i henhold til gode temperaturfremstillinger, at vi fikk en god del av netto oppvarming i første halvdel av forrige århundre. Gode fremstillinger viser også lite temperaturstigning etter år 2000, godt hjulpet av det siste årets globale temperaturfall, som vist her av UAHs Dr. Spencer.
Vitenskapelige eksempler rundt en global varmeperiode
Blant de tallrike undersøkelsene som understøtter et vitenskapelig syn rundt «middelalderens varmeperiode» som et globalt fenomen, kan man trekke frem gode eksempler utenfor Europa og Nord-Amerika: Undersøkelse av oksygenisotoper på New Zeland viser en markert varmeperiode i middelalderen, særlig i årene 1200-1400. (MWP står for Medieval Warm Period) [A T Wilson et al, 1979]
Undersøkelse av karbonisotoper i sedertrær i Japan viser en markert varmeperiode, spesielt i årene 800-1250. [H Kitagawa et al, 1995] Undersøkelse av plankton i Indonesia viser en markert varmeperiode, år 1000-1300. [A Newton et al, 2006] En pigmentbasert undersøkelse av jordsedimentkjerner sentralt i Chile viser en markert varmeperiode i årene 900-1350. [L von Gunten et al, 2009] Undersøkelse av jordsedimenter på Antarktishalvøya viser en markert varmeperiode, år 1000-1450. [B K Khim et al, 2002] Treringundersøkelse fra Karakorumfjellene i Pakistan viser en meget varm klimaperiode rundt år 1000. [K S Treydte et al, 2009] Sammensatte undersøkelser av vintertemperatur i Øst-Kina viser en tydelig varmeperiode i fra år 800-1300. [Q Ge et al, 2003] Arbeid rundt blant annet oksygenisotoper i Sør-Afrika viser en markert varmeperiode i årene 1000-1300. [P D Tyson et al, 2000]
Amazing! Your site has quite a few comment posts. How did you get all of these bloggers to look at your site I’m envious! I’m still studying all about posting articles on the net. I’m going to view pages on your website to get a better understanding how to attract more people. Thank you!
Does your site have a contact page? I’m having problems locating it but, I’d like to send you an email. I’ve got some recommendations for your blog you might be interested in hearing. Either way, great site and I look forward to seeing it improve over time.
I mastered more something totally new on this weight loss issue. One issue is a good nutrition is extremely vital when dieting. An enormous reduction in fast foods, sugary foods, fried foods, sweet foods, pork, and white colored flour products can be necessary. Possessing wastes unwanted organisms, and contaminants may prevent targets for fat loss. While specified drugs quickly solve the challenge, the awful side effects are usually not worth it, and in addition they never offer more than a short lived solution. It is just a known idea that 95 of celebrity diets fail. Many thanks for sharing your ideas on this website.
This website has lots of really useful stuff on it. Thanks for informing me.
Hey! awesome blog! I happen to be a daily visitor to your site (somewhat more like addict 😛 ) of this website. Just wanted to say I appreciate your blogs and am looking forward for more!
Hey would you mind stating which blog platform you’re using? I’m planning to start my own blog in the near future but I’m having a difficult time making a decision between BlogEngine/Wordpress/B2evolution and Drupal. The reason I ask is because your design seems different then most blogs and I’m looking for something unique. P.S My apologies for getting off-topic but I had to ask!
Attractive section of content. I just stumbled upon your weblog and in accession capital to assert that I acquire in fact enjoyed account your blog posts. Any way I?ll be subscribing to your feeds and even I achievement you access consistently fast.
Simply desire to say your article is as astounding. The clearness in your post is just excellent and i can assume you are an expert on this subject. Well with your permission let me to grab your RSS feed to keep updated with forthcoming post. Thanks a million and please carry on the rewarding work.
Hiya, I’m really glad I’ve found this info. Today bloggers publish just about gossips and internet and this is actually irritating. A good site with exciting content, this is what I need. Thanks for keeping this website, I will be visiting it. Do you do newsletters? Can’t find it.
Its like you read my mind! You seem to know a lot about this, like you wrote the book in it or something. I think that you can do with some pics to drive the message home a little bit, but other than that, this is fantastic blog. A great read. I will definitely be back.
With havin so much content and articles do you ever run into any problems of plagorism or copyright infringement? My website has a lot of unique content I’ve either written myself or outsourced but it seems a lot of it is popping it up all over the web without my agreement. Do you know any ways to help reduce content from being stolen? I’d truly appreciate it.
It’s my belief that mesothelioma can be the most deadly cancer. It’s got unusual features. The more I really look at it the harder I am sure it does not respond like a true solid flesh cancer. In case mesothelioma can be a rogue virus-like infection, so there is the probability of developing a vaccine and also offering vaccination to asbestos uncovered people who are at high risk involving developing upcoming asbestos linked malignancies. Thanks for expressing your ideas on this important health issue.
excellent points altogether, you just received a new reader. What may you recommend in regards to your publish that you made a few days ago? Any positive?
bdk covers
bdk covers review
This article is absolutely incredible! The author has done a fantastic job of delivering the information in an compelling and educational manner. I can’t thank him enough for providing such precious insights that have definitely enlightened my knowledge in this topic. Hats off to him for creating such a masterpiece!
I’m very pleased to discover this web site. I want to to thank you for your time due to this fantastic read!! I definitely loved every little bit of it and i also have you bookmarked to check out new information on your site.
I think other web-site proprietors should take this site as an model, very clean and magnificent user genial style and design, as well as the content. You are an expert in this topic!
Audio began playing anytime I opened this site, so irritating!
Good web site! I really love how it is simple on my eyes and the data are well written. I am wondering how I might be notified whenever a new post has been made. I have subscribed to your RSS which must do the trick! Have a nice day!
Does it look like we’re in for a big ride here?
Many thanks for this article. I’d also like to state that it can end up being hard when you are in school and starting out to establish a long credit ranking. There are many individuals who are just simply trying to live and have an extended or good credit history is often a difficult thing to have.
Are grateful for this blog post, it’s tough to find good information and facts on the internet
I really love this article.
“Wireless earbuds for long flights”
Destination-Specific Keywords
Hi my family member! I want to say that this article is amazing, great written and include approximately all important infos. I’d like to see more posts like this .
The information shared is of top quality which has to get appreciated at all levels. Well done…
Thank you so much for sharing this wonderful post with us.
Advanced reading here!
I will share you blog with my sis.
An interesting discussion is price comment. I think that you need to write more on this matter, it won’t be a taboo topic however generally individuals are not sufficient to talk on such topics. To the next. Cheers
This design is wicked! You most certainly know how to keep a reader amused. Between your wit and your videos, I was almost moved to start my own blog (well, almost…HaHa!) Excellent job. I really loved what you had to say, and more than that, how you presented it. Too cool!
This is one very informative blog. I like the way you write and I will bookmark your blog to my favorites.
Substantially, the post is really the best on this laudable topic. I concur with your conclusions and will eagerly watch forward to your future updates.Just saying thanx will not just be enough, for the wonderful lucidity in your writing.
I feel this is among the such a lot important info for me. And i am satisfied reading your article. However want to statement on some common issues, The website style is perfect, the articles is truly great : D. Excellent activity, cheers
Thank you so much for sharing this wonderful post with us.
Nice i really enjoyed reading your blogs. Keep on posting. Thanks
Dołącz do Kasyna Pelican już teraz i skorzystaj z ekskluzywnego Bonusu BEZ DEPOZYTU o wartości 60 zł (€/$ 15), aby rozpocząć grę bez ryzyka!
Thanks for your posting. I have always seen that the majority of people are needing to lose weight because they wish to look slim along with attractive. On the other hand, they do not often realize that there are many benefits so that you can losing weight additionally. Doctors insist that overweight people experience a variety of illnesses that can be directly attributed to their own excess weight. Thankfully that people who sadly are overweight and suffering from various diseases are able to reduce the severity of their illnesses by way of losing weight. It’s possible to see a steady but identifiable improvement in health if even a moderate amount of weight-loss is accomplished.
Thank you for sharing indeed great looking !
Thank you for sharing indeed great looking !
I have noticed that car insurance companies know the automobiles which are liable to accidents and various risks. Additionally, these people know what types of cars are inclined to higher risk and the higher risk they have got the higher the premium price. Understanding the simple basics regarding car insurance just might help you choose the right sort of insurance policy that could take care of your family needs in case you happen to be involved in any accident. Appreciate your sharing the actual ideas on the blog.
Hmm it appears like your site ate my first comment (it was extremely long) so I guess I’ll just sum it up what I had written and say, I’m thoroughly enjoying your blog. I too am an aspiring blog writer but I’m still new to everything. Do you have any helpful hints for novice blog writers? I’d certainly appreciate it.
It?s really a nice and helpful piece of info. I?m glad that you shared this useful information with us. Please keep us informed like this. Thanks for sharing.
Hello There. I found your blog using msn. This is an extremely well written article. I?ll be sure to bookmark it and come back to read more of your useful information. Thanks for the post. I will certainly comeback.