date:          Thu, 31 Oct 1996 18:38:43 
from: Andrey.Salamatin@ksu.ru
subject:       Abstract submission
to: mscarlett@peg.apc.org, convnet@peg.apc.org, p.jones@uea.ac.uk

IAMAS/IAPSO Secretariat
Convention Network
224 Rouse Street
Port Melbourne Victoria 3207
AUSTRALIA

E-mail: mscarlett@peg.apc.org
        convnet@peg.apc.org
        p.jones@east-anglia.ac.uk  

                                           November 1, 1996  

Dear Organizing Committee,
Dear Prof. Phil Jones:

Please find enclosed into this message a repeatedly sent the Notice
of Intention to Attend and the Abstract Submission Form for a 
presentation at the Symposium JMP17. The file containing the abstract 
in the Microsoft Word format is also attached.

I would be much obliged if the Organizing Committee could respond by 
a confirmation, confirming that the materials are acceptable for 
consideration. 

I would also request to inform me in what way and to what address I
could apply for a supporting grant to cover my travel and living
expenses to participate in the Symposia.

Sincerely
Andrey N. Salamatin
Professor
Kazan State University
Russia

**********************************************************************

                  NOTICE OF INTENTION TO ATTEND

                     Professor
Surname:             SALAMATIN
Given Names:         ANDREY
Organization:  Kazan State University
Department:    Department of Applied Mathematics
Position:      Professor
Address:       Kazan State University, 18, Lenin Street, KAZAN
State (Republic): Tatarstan, Post Code: 420008, Country: RUSSIA
Tel.: (7)(8432)31-84-45, Fax:(7)(8432)38-09-94, 38-74-18
E-mail: Andrey.Salamatin@ksu.ru

I am interested in a scientific tour: 
           Seminar on Antarctica & Global Change 
       - Hobart, Tasmania - Australia (13-19 July, 1997)

**********************************************************************

                   ABSTRACT SUBMISSION FORM
                                                         Page 1

Abstract Title: Temperature Change During the Last Climate
                Transition in Central Antarctica as Deduced 
                from Borehole Temperature and Isotopic Record
                at Vostok Station
Corresponding Author's Name:    Andrey N. Salamatin
Contact Address:     Kazan State University, 18, Lenin Street
City: KAZAN, State(Republic): Tatarstan, Post Code: 420008,
Country: RUSSIA, 
      Tel.: (7)(8432)31-84-45, Fax: (7)(8432)38-09-94, 38-74-18
E-mail: Andrey.Salamatin@ksu.ru

I would like to present my paper in Symposium:
                   Palaeoclimate in the Southern Hemisphere - JMP17

I would prefer my presentation to be ORAL.

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--
                                                           Page 2


        Temperature Change During the Last Climate Transition 
  in Central Antarctica as Deduced from Borehole Temperature and
                   Isotopic Record at Vostok Station

                        Andrey N. Salamatin
                Kazan State University, Kazan, Russia

              Vladimir Ya. Lipenkov, Nartsiss I. Barkov
   Arctic and Antarctic Research Institute, St.Petersburg, Russia

Temperature measurements in deep boreholes drilled at Vostok Station
(East Antarctica) have provided the ice-sheet temperature profile 
down to a depth of 2700 m. The accuracy of the data is sufficient to 
analyze perturbations induced by the recent climate history and to 
calibrate isotopic paleothermometer. A special mathematical model and 
computer system are developed to infer the main Milankovitch 
components of temperature climatic oscillations on the glacier 
surface in the past directly from the temperature - depth curve.
    The ratio between ice-core deuterium content and cloud 
temperature fluctuations (at the top of the inversion layer) is also 
verified by fitting the simulated and measured present-day borehole 
temperature profiles. It appears that this value may be about 5.8-6.5 
permil/C, i.e. approximately 30% lower than the conventional estimate 
(9 permil/C) derived from the contemporary spatial distribution of 
isotopes over the Antarctic ice sheet. At the same time it becomes 
evident that the surface temperatures responsible for the thermal 
state of the glacier body does not proportionally follow the inversion 
temperatures. The precession climatic oscillations in the inversion 
strength undergo additional selective amplification which makes the 
early Holocene temperatures on the ice- sheet surface warmer and the 
glacial temperatures lower than it was thought before. To understand 
this effect one should take into account the fact that the positive 
difference between the mean annual inversion and surface temperatures 
is mainly a seasonal (winter) phenomenon. Hence, the relatively high 
amplitude of the precession component in the surface temperature 
oscillations in comparison with the one of the inversion temperature 
may be just a direct consequence of an essentially stronger precession 
signal in the seasonal temperature response to orbital forcing than in 
the mean annual temperature variations in the atmosphere for Central 
Antarctica.
    The glacial - interglacial temperature increase over Central 
Antarctica was determined to be about 15C in the ice-sheet surface 
temperature shifting from -69.6C during the Last Glacial Maximum (20-
22 kyr BP) to -54.6C in the Holocene Optimum (8-10 kyr BP) with the 
early Holocene temperatures on the surface 3.3C warmer than the 
present-day level -57.9C. The corresponding increase in the inversion 
temperature was about 9C. All these estimates are noticeably larger 
than it has been previously indicated and are much closer to the 
revised palaeotemperature changes (21-22C) recently reconstructed from 
the GISP and GRIP ice-core isotope records in Greenland.
