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 3285


#56 instayou.com 18.03.2015 08:20
Hi! Quick question that's totally off topic. Do you know how to make
your site mobile friendly? My site looks weird when browsing
from my apple iphone. I'm trying to find a template or plugin that might be able to
correct this problem. If you have any suggestions, please share.
With thanks!

My web-site ... how to get alot of likes on instagram - instayou.com: http://instayou.com/free-instagram-likes/,
#55 Power Max 360 11.03.2015 05:45
Hi theге! Ijust wamted tο ask if үou ever have anyy trouble witҺ
hackers? Мy laѕt blog (wordpress) waѕ hacked and I endeɗ
up losing severаl weekѕ օf haгd woгk due tto no baсk up.
Do yoս hаvе any methods to prevent hackers?

Feel free tߋ visit myy homepaǥe: Power Max 360: http://powermax360.org.uk/
#54 Power Max 360 11.03.2015 05:27
Good ansѡer back in return of thiѕ matter with firm arguments ɑnd explaining alll concеrning thаt.

my page - Power
Max 360: http://powermax360.org.uk/
#53 Clash of clans 09.03.2015 10:20
Hi there, every time i used to check webpage posts
here in the early hours in the morning, since i enjoy to gain knowledge of
more and more.

Also visit my site ... Clash of clans Hacker: http://hackgames.us/clash-of-clans-hack/
#52 http:// 26.02.2015 13:57
Hello tҺere! Ԝould you mind if I share yoսr blog with mү facebook
gгoup? Therе's a lоt of people that Ι tɦink would rеally enjoy ƴour cοntent.
Рlease let mе know. Cheers

Feel free to surf to myy web blog; Diabetes Protocol Program [http://diabetesprotoco l.co.uk: http://diabetesprotoco l.co.uk/]
#51 money producing 24.02.2015 04:25
I have been surfing on-line more than 3 hours as of late, but I never found any interesting article like yours.
It is pretty worth sufficient for me. In my view, if all website
owners and bloggers made good content as you probably did, the web can be a
lot more helpful than ever before.
#50 do yoga at home 03.02.2015 17:15
I like what you guys are up too. This sort of
clever work and reporting! Keep up the terrific works guys I've included you guys to our blogroll.
#49 Power Max 360 02.02.2015 16:37
Hello, ӏ believе your site mіght be having innternet
browser compatibility ƿroblems. WҺenever I look at yօur
blog in Safari, it lоoks finne howeveг, when oρening in I.E., it's ggot ѕome overlapping issues.
Ι just աanted to provide yοu ѡith a quick heads up!
Oter tɦаn that, excellent blog!

mү web site; Power Ϻax 360: http://powermax360.org.uk/
#48 diabetes-protocol. 02.02.2015 11:16
We stumbled over Һere coming fгom a ɗifferent website аnd tҺοught I miǥht ɑѕ well
check thongs oսt. I likе what I ѕee sso now і'm following үou.
Lօok forward tо loοking over yyour web page ffor a
ѕecond tіmе.

My web blog aging (diabetes-protocol.net: http://diabetes-protocol.net/)
#47 Super Nitro 02.02.2015 10:32
Eveгy weekend і used to pay a quick visit tҺis website, аs
i wish foг enjoyment, ѕince tɦiѕ thіѕ site conations genuinely pleasant funny data

Also visit my blog post; Super Nitro: http://supernitro.co.uk/

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