• Determine altered cycle of magnetic susceptibility at the sedimentary sequences in the cave  from late Pleistocene up to now in the relationship with climatic transforms.
• Rebuild altered tendency climatic and forecast tendency climatic for act of god palliative and environmental protection task.

Theoretical results

Base on the MS results of 757 samples of sediment  from late Pleistocene up to now in the 7 sections belong to 4 caves in North of Vietnam Conmoong- Thanh Hoa, Cho cave- Hoabinh, To- Sonla, Mo shelf- Son La conjunction with data of archaeology, C14 age, pollen and petrologic components, we have results bellows:

• The 1^st time in Vietnam in Vietnam we are archived the MS collections in 7 sections: Conmoong cave (2 section: CM and CMI17), Cho cave (2 sections: CR and CR4), To 2 cave (2 sections: TO2H1 and YO2H3) and Lanmo shelf (1 section LM). All the sections have of good quality was used to partition MS zones.
• CM section belong to Conmoong caves was divided into 6 MS zones: SA13- SA18. Among them zones SA13, SA15, SA17 are warm, SA14, SA16, SA18 are cold.
• CMI17 section belong to Conmoong cave was devided into 6 MS zones: SA12- SA17. Among of them zones SA13, SA15, SA17 are warm, SA12, SA14, SA16 are cold.
• CR section belong to Cho cave was divided into 8 no- continuous MS zones. There is a discontinuous in this section. There are: SA13, SA14, SA15, SA20, SA21, SA22, SA23 are cold. The work of divide into MS zones led to detective a discontinous in this section, what has not yet been know previously.
• TO2H1 section belong to TO2 cave was divided into 9 MS zones SA1- SA9. Among them zones SA1, SA3, SA5, SA9 are warm. Remaining zones are cold.
• LM section belong to Lanmo Shelf was divided into 12 MS zones: SA9- SA20. Among them SA9, SA11, SA13, SA15, SA17, SA19 are warm, remaining zones are cold,

Base on correlation MS zones of all the good sections in the caves of North Vietnam, we rebuild paleoclimate model from late Pleistocene 22000 year BP up to 3000 year BP. This model show the main tendency of climate in North of Vietnam during 22000 year BP up to now: The warm, wet conditions and dry, cold conditions continuous step by step from late Pleistocene to half earlier Holocene, and then the warm, moisture conditions was predominantly, so there was alternate the short time of cold.

There are some big event of climate shown in MS data of the caves of Vietnam: Younger Dryas was have seen in SA14, Hienrich1 event was have seen in SA20, the last maximum glacial (LGM) cycles was have seen in SA22.

Using extrapolation function for MS data, climatic up to now was built. The result show that: we are in the time of the warm and temperature increase.

• Base on correlation MS zone of all the good sections in the caves of North Vietnam, we rebuild paleoclimate model from late Pleistocene 22000 year BP up to 3000 year BP. This model show the main tendency of climate in North of Vietnam during 22000 year BP up to now: The warm, wet conditions and dry, cold conditions continuous step by step from late Pleistocene to half earlier Holocene, and then the warm, moisture conditions was predominantly, so there was alternate the short time of cold.
• There are some big event of climate shown in MS data of the caves of Vietnam: Younger Dryas was have seen in SA14, Heinrich1 event was have seen in SA20, the last maximum glacial (LGM) cycles was have seen in SA22.
• Using extrapolation function for MS data, climatic model up to now was built. The result show that: we are in the time of the warm and temperature increase.

Scientific papers in referred journals (list):

• Luu Thi Phuong Lan, Ellwood B. B, Nguyen Chien Thang., 2009, Younger Dryas in Magnetic susceptibility data of Conmoong cave (Thanh Hoa), Journal of sciences of the earth, V. 31 (4), 410- 417p.
• Luu Thi Phuong Lan, Ellwood B.B, Nguyen Thanh Dung, 2010, Magnetic susceptibility of sediment in the Cho cave, Hoabing relationship with paleoclimate, Science conference celebrate 35 years Vietnam science Academy. 10/2010, 137- 143

We is permitted to enlarge research on another cavern for palaeoclimate altered models more detail.