Климат, лед, вода, ландшафты

Climate, ice, water, landscapes

Рудой Алексей Николаевич

2009. Наталия Рудая, Павел Тарасов и др. Голоцен Монголии...


© Quaternary Science Reviews 

Holocene environments and climate in the Mongolian Altai reconstructed from the Hoton-Nur pollen and diatom records: a step towards better understanding climate dynamics in Central Asia

Natalia Rudaya, Pavel Tarasov, Nadezhda Dorofeyuk, Nadia Solovieva, Ivan Kalugin, Andrei Andreev, Andrei Daryin, Bernhard Diekmann, Frank Riedel,, Narantsetse, Tserendash, Mayke Wagner

A b s t r a c t

This study presents the results of the palynological and diatom analyses of the sediment core recovered in Hoton-Nur Lake (483701800N, 882004500E, 2083 m) in 2004. Quantitative reconstruction of the Holocene vegetation and climate dynamics in the semiarid Mongolian Altai suggests that boreal woodland replaced the primarily open landscape of northwestern Mongolia at about 10 kyr BP (1 kyrј 1000 cal yr)in response to a noticeable increase in precipitation from 200–250 mm/yr to 450–550 mm/yr. A decline of the forest vegetation and a return to a predominance of open vegetation types occurred after 5 kyr BP when precipitation sums decreased to 250–300 mm/yr. Prior to 11.5 kyr BP diatom concentrations are relatively low and the lake is dominated by planktonic Cyclotella and small Fragilariaceae, suggesting the existence of a relatively deep a d oligotrophic/mesotrophic lake. The great abundance of Staurosirellapinnata from the beginning of the record until 10.7 kyr BP might imply intensified erosion processes in the catchment and this is fully consistent with the presence of scarce and dry vegetation and the generally arid climate during this period. From about 10.7 kyr BP, more planktonic diatom taxa appeared and increased in abundance, indicating that the lake became more productive as diatom concentration increased. This change correlates well with the development of boreal woodland in the catchment. Decrease in precipitation and changes in the vegetation towards steppe are reflected by the rapid increase in Aulacoseira distans from about 5 kyr BP. The Holocene pollen and diatom records do not indicate soil and vegetation cover disturbances by the anthropogenic activities, implying that the main transformations of the regional vegetation occurred as a result of the natural climate change. Our reconstruction is in agreement with the paleomonsoon records from China, demonstrating an abrupt strengthening of the summer monsoon at 12 kyr BP and an associated increase in precipitation and in lake levels between 11 and 8 kyr BP, followed by the stepwise attenuation of the monsoon circulation and climate aridization towards the modern level. The records from the neighboring areas of Kazakhstan and Russia, situated west and north of Hoton-Nur, demonstrate spatially and temporally different Holocene vegetation and climate histories, indicating that the Altai Mountains as a climate boundary are of pivotal importance for the Holocene environmental and, possibly, habitation history of Central Asia.


2008 © Elsevier Ltd. All rights reserved.

23.03.2011 16:12 4153


#145 Anjelica Verlato 02.07.2015 22:50
This article is likely to talk concerning the advantages that Cheap Online Car Insurance Quotes a bad credit score loans apply online
you can take advantage of Anjelica
Verlato: http://www.robertadicamerino.com/?option=com_k2&view=itemlist&task=user&id=525895 getting financing with the dealership might be possible,
but expect to pay a higher interest rate.
#144 The Tribez Cheats 02.07.2015 15:03
Do you mind if I quote a couple of your articles as long
as I provide credit and sources back to your blog?
My blog site is in the very same area of interest as
yours and my visitors would really benefit from some of the information you present here.
Please let me know if this okay with you. Regards!

Also visit my web site The Tribez Cheats: http://tooldownloads.wikidot.com/blog:18
#143 The Tribez Hack 01.07.2015 15:47
Hi there! This post couldn't be written any better!
Looking at this article reminds me of my previous roommate!
He always kept preaching about this. I am going to send this information to
him. Fairly certain he'll have a good read. Many thanks for sharing!

Feel free to surf to my weblog - The Tribez Hack: http://www.kiwibox.com/nilufay/blog/entry/130453071/the-tribez-hack/?pPage=0
#142 newgamingcheats. 01.07.2015 11:07
It's amazing to pay a quick visit this site
and reading the views of all colleagues on the topic of this paragraph,
while I am also zealous of getting knowledge.

Feel free to visit my blog :: The Tribez Hack; newgamingcheats .jimdo.com: http://newgamingcheats .jimdo.com/2015/06/30/the-tribez-hack-tool-for-ios-and-android/,
#141 Tribez Hack 01.07.2015 08:32
Can you tell us more about this? I'd want to find out more details.

my homepage: Tribez Hack: https://downloadtool.wordpress.com/2015/06/30/the-tribez-android-hack-cheat-coins-and-gems/
#140 Tribez Hack 30.06.2015 21:12
Hi there all, here every one is sharing these kinds of knowledge, so it's pleasant to read this website, and I used to
visit this webpage daily.

Check out my web blog Tribez Hack: http://newgamehacks.bravesites.com/entries/general/the-tribez-hack-tool
#139 smurfs Village 29.06.2015 17:58
I don't even understand how I ended up right here, however I believed this
submit used to be good. I don't understand who you might be but certainly you are going to a
well-known blogger in case you are not already.

Here is my page ... smurfs Village cheats: http://newgamehacks.bravesites.com/entries/general/smurfs-village-hack
#138 http:// 29.06.2015 05:10
Hello There. I found your blog using msn. This is a
very well written article. I'll make sure to bookmark it and come back to read
more of your useful info. Thanks for the post. I will definitely comeback.

Feel free to visit my website Smurfs Village Hack - http://tooldownloads.wikidot.com/: http://tooldownloads.wikidot.com/blog:17 -
#137 hacksclashofclans.pw 28.06.2015 10:06
Today, I went to the beach front with my kids. I
found a sea shell and gave it to my 4 year old daughter and said "You can hear the ocean if you put this to your ear." She
put the shell to her ear and screamed. There was a
hermit crab inside and it pinched her ear. She never
wants to go back! LoL I know this is completely off topic
but I had to tell someone!

My web blog ... clash of clans hack (hacksclashofcl ans.pw: http://hacksclashofclans.pw)
#136 michael kors outlet 28.06.2015 05:08
If your revenue dropped significantly, Fannie Mae and Freddie Mac
might also decline that loan based on their guidelines michael kors outlet clearance: http://Arbinger.in/this-earned-income-tax-credit-history-assist-if-youve-got-lower-salaries/ small loans - smaller assistance for
smaller needs.

Добавить комментарий

Прощай мой дом

JavaScript is disabled!
To display this content, you need a JavaScript capable browser.

О проекте

Всё об удивительном и загадочном мире льда и ледников, ландшафтов и людей и их жизни. Всё о планете Земля и о других планетах.

Интересы: снег, вода, горы, лед, катастрофы, все, климат, рельеф, ледники, приледниковые озёра, геоморфология, гляциология, новые теории и проекты в гляциологии, геологии и геоморфологии, а также качественная музыка и всё интересное и в науке, и в экспедициях, что сочтут для себя важным участники проекта, в природе и в жизни.. ....в общем всё.

Наши новости
Текущая информация для студентов
Ключевые слова

logotipЧитателям, слушателям и просто прохожим: сайт и все материалы, опубликованные на нём -  интеллектуальная собственность владельца сайта, и/или авторов соответствующих материалов. Ссылки на сайт, а также ссылки на авторов публикаций,


(и фотографий, разумеется, тоже) обязательны. Соответствующие законы РФ и других стран известны, лицензии - на месте. Воруют, конечно, и не взирая на копирайты, но мы создали сайт для порядочных людей. Не хочется об этом напоминать, но факт любой недобросовестной ссылки-цитирования или пересказа, во- первых, будет предан широчайшей огласке через сеть всеми популярными научными каналами. А далее, возможно, последует и во-вторых..... Спасибо.

Контакты: ran@mail.tomsknet.ru