LOTRED-SA - Long-Term climate REconstruction and Dynamics of South America

Regional high-resolution multi-proxy climate reconstructions for the last ca. 1000 years are a priority area of future research within IGBP-PAGES (Wanner 2005). While considerable progress has been made on the northern hemisphere (Pauling et al. 2006), adequate data sets and reconstructions are missing for the southern hemisphere.

Regional reconstructions are particularly important since regional climate change and extremes exhibit much larger amplitudes than hemispheric and global reconstructions. Monthly to seasonal temperature reconstruction for Europe since 1500 AD (e.g., Luterbacher et al. 2004; Xoplaki et al. 2005) and the drought reconstruction for the western US (Cook et al. 2004) have set new standards for regional scales. Similar studies are missing for other regions of the world.

This LOTRED- SA initiative is conceived as a collaborative long-term effort that seeks to:

1. Collate the large number of disperse already existing and new multi-proxy paleoclimate data sets (documentary data, early instrumental data and natural proxies) for the last ca. 1000 - 2000 years available for South America, and

2. Use the Mann et al. (1998), Luterbacher et al. (2004) and Moberg et al. (2005) methodologies to work towards a regional reconstruction at different temporal and spatial resolution for southern South America.

Background and Working Group Proposal

Read LOTRED-SA's initial proposal here.

Contact

Interested in joining or contributing? Please This email address is being protected from spambots. You need JavaScript enabled to view it. us.

 

This initiative seeks to involve research groups from different countries working within a common frame for to achieve our scientific goals:

1. to collate, maintain and share a common, state-of-the-art database with the available multi-proxy datasets.

2. to produce, as a collective of authors, a series of research results and papers that exceed the capacity of us as individuals. Results may include a gridded data set for temperature and precipitation reconstructions, the diagnosis of solar and volcanic forcing, and the analysis of extreme events, among others.

3. compare the multi-proxy reconstruction with results from GCM runs for the last 1000 - 2000 years or selected windows of interest.

 

You can read more about contributing to the database under the Metadatabase field.

A set of expected results (“What can be done with the database?”) is given with the example from the European database. This is indeed a visionary goal and will depend on the data available.

 

LOTRED-SA is a bottom-up initiative and seeks to involve as many individual researchers and groups as possible. All the types of archives are represented by individuals in the “Coordinating Committee”

Coordinators

Ricardo Villalba, IANIGLA, Mendoza, Argentina

Martin Grosjean, NCCR Climate, University of Bern, Switzerland

Scientific Steering Committee

Ignacio Mundo, IANIGLA-CONICET, Mendoza, Argentina

Mariano Masiokas, IANIGLA-CONICET, Mendoza, Argentina

Duncan Christie, Universidad Austral de Chile, Valdivia, Chile

Raphael Neukom, University of Bern, Switzerland

Andres Rivera, CECS, Valdivia, Chile

Antonio Lara, Universidad Austral de Chile, Valdivia, Chile

María del Rosario Prieto, IANIGLA-CRICYT, Mendoza, Argentina

Mariano Morales, IANIGLA-CONICET, Mendoza, Argentina

Coordinating Committee (non-exclusive)

Documentary data, early instrumental data:

Alain Gioda, IRD France, Archival Climatic History Survey (ARCHISS) 

 

Tree rings:

Pepe Boninsegna, IANIGLA-CRYCIT, Mendoza, Argentina 

Jaime Argollo, Universidad San Andrei, Bolivia

 

Lake and marine sediments:

Eduardo Piovano, CIGES, Universidad de Cordoba, Argentina

This email address is being protected from spambots. You need JavaScript enabled to view it. , Universidad de Chile, Santiago, Chile

 

Ice cores:

Françoise Vimeux, IRD Great Ice/LSCE, Gif-sur-Yvette, France

Margit Schwikowski, University of Bern and PSI, Switzerland

 

Glaciers:

This email address is being protected from spambots. You need JavaScript enabled to view it. , IANIGLA-CRICYT, Mendoza, Argentina

Mariano Masiokas, IANIGLA-CRICYT, Mendoza, Argentina

This email address is being protected from spambots. You need JavaScript enabled to view it. , IRD, Bolivia

Antoine Rabatel, IRD Great Ice, Grenoble, France

 

Methodology:

Jürg Luterbacher, Justus-Liebig-University Giessen, Germany

 

Climate 20th century:

Mathias Vuille, University of Albany, USA

Rosa Compagnucci, University of Buenos Aires, Argentina

 

Modeling group:

This email address is being protected from spambots. You need JavaScript enabled to view it. , LDEO, Columbia University, USA

Christoph Raible, KUP, University of Bern

Anne Coudrain, Great Ice Project, France

 

Group: lotred-sa

Journal articles

1.
Neukom R, Gergis J, Karoly D, Wanner H et al.,
(2014),
Inter-hemispheric temperature variability over the past millennium,
Nature Climate Change,
Vol. Published online 30 March.

2.
Neukom R & Gergis J,
(2012),
Southern hemisphere high-resolution palaeoclimate records of the last 2000 years,
The Holocene,
Vol. 22,
Issue 5,
501-524.

3.
Neukom R & Luterbacher J,
Eds. Bondre N,
(2011),
Climate Variability in the Southern Hemisphere,
IGBP Global Change Magazine,
Issue 76,
26-29.

4.
Neukom R, Luterbacher J, Villalba R, Küttel M et al.,
(2010),
Multi-Centennial Summer and Winter Precipitation Variability in Southern South America,
Geophysical Research Letters,
Vol. 37,
Issue 14,
L14708.

5.
Neukom R, Luterbacher J, Villalba R, Küttel M et al.,
(2010),
Multiproxy Summer and Winter Surface Air Temperature Field Reconstructions for Southern South America Covering the Past Centuries,
Climate Dynamics,
Vol. 37,
Issue 1-2,
35-51.

Special issues

1.
Masiokas MH, Christie D, Grosjean M, Rivera A et al.,
Eds. Masiokas MH, Christie D, Grosjean M, Rivera A, Villalba R & Kiefer T,
(2012),
Climate Variations in South America Over the Last 2000 Years,
Climate of the Past.

2.
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Long-Term Multi-Proxy Climate Reconstructions and Dynamics in South America (LOTRED-SA): State of the Art and Perspectives,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
175-376.

Special issue articles

1.
Vuille M, Burns SJ, Taylor BL, Cruz FW et al.,
(2012),
A Review of the South American Monsoon History as Recorded in Stable Isotopic Proxies Over the Past Two Millennia,
Climate of the Past: Special Issue,
Vol. 8,
1309-1321.

2.
Wilmes SB, Raible CC & Stocker TF,
(2012),
Climate Variability of the Mid- and High-Latitudes of the Southern Hemisphere in Ensemble Simulations From 1500 to 2000 AD,
Climate of the Past: Special Issue,
Vol. 8,
373-390.

3.
Wagner S, I. Fast & Kaspar F,
(2012),
Comparison of 20th Century and Pre-Industrial Climate Over South America in Regional Model Simulations,
Climate of the Past: Special Issue,
Vol. 8,
1599-1620.

4.
Prieto MR & Rojas F,
(2012),
Documentary Evidence for Changing Climatic and Anthropogenic Influences on the Bermejo Wetland in Mendoza, Argentina, During the 16th–20th Century,
Climate of the Past: Special Issue,
Vol. 8,
951-961.

5.
Holz A, Haberle S, Veblen TT, Pol-Holz RD & Southon J,
(2012),
Fire History in Western Patagonia From Paired Tree-Ring Fire-Scar and Charcoal Records,
Climate of the Past: Special Issue,
Vol. 8,
451-466.

6.
Ruiz L, Masiokas MH & Villalba R,
(2012),
Fluctuations of Glaciar Esperanza Norte in the North Patagonian Andes of Argentina During the Past 400 yr,
Climate of the Past: Special Issue,
Vol. 8,
1079-1090.

7.
Gayo EM, Latorre C, Santoro CM, Maldonado A & Pol-Holz RD,
(2012),
Hydroclimate Variability in the Low-Elevation Atacama Desert Over the Last 2500 yr,
Climate of the Past: Special Issue,
Vol. 8,
287-306.

8.
Daley TJ, Mauquoy D, Chambers FM, Street-Perrott FA et al.,
(2012),
Investigating Late Holocene Variations in Hydroclimate and the Stable Isotope Composition of Precipitation Using Southern South American Peatlands: An Hypothesis,
Climate of the Past: Special Issue,
Vol. 8,
1457-1471.

9.
Rivera A, Koppes M, Bravo C & Aravena JC,
(2012),
Little Ice Age advance and retreat of Glaciar Jorge Montt, Chilean Patagonia,
Climate of the Past: Special Issue,
Vol. 8,
403-414.

10.
Leclercq PW, Pitte P, Giesen RH, Masiokas MH & Oerlemans J,
(2012),
Modelling and Climatic Interpretation of the Length Fluctuations of Glaciar Frías (North Patagonian Andes, Argentina) 1639–2009 AD,
Climate of the Past: Special Issue,
Vol. 8,
1385-1402.

11.
Mundo IA, Masiokas MH, Villalba R, Morales MS et al.,
(2012),
Multi-Century Tree-Ring Based Reconstruction of the Neuquén River Streamflow, Northern Patagonia, Argentina,
Climate of the Past: Special Issue,
Vol. 8,
815-829.

12.
Bertrand S, Hughen KA, Lamy F, Stuut J-BW et al.,
(2012),
Precipitation as the Main Driver of Neoglacial Fluctuations of Gualas Glacier, Northern Patagonian Icefield,
Climate of the Past: Special Issue,
Vol. 8,
519-534.

13.
Morales MS, Christie DA, Villalba R, Argollo J et al.,
(2012),
Precipitation changes in the South American Altiplano since 1300 AD reconstructed by tree-rings,
Climate of the Past: Special Issue,
Vol. 8,
653-666.

14.
Barichivich J, Sauchyn DJ & Lara A,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Climate signals in high elevation tree-rings from the semiarid Andes of north-central Chile: Responses to regional and large-scale variability,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
320-333.

15.
Vimeux F, Ginot P, Schwikowski M, Vuille M et al.,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Climate variability during the last 1000 years inferred from Andean ice cores: A review of methodology and recent results,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
229-241.

16.
Boninsegna JA, Argollo J, Aravena JC, Barichivich J et al.,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Dendroclimatological reconstructions in South America: A review,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
210-228.

17.
Prieto MdR & Herrera RG,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Documentary sources from South America: Potential for climate reconstruction,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
196-209.

18.
Christie DA, Lara A, Barichivich J, Villalba R et al.,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
El Niño-Southern Oscillation signal in the world\'s highest-elevation tree-ring chronologies from the Altiplano, Central Andes,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
309-319.

19.
Jomelli V, Favier V, Rabatel A, Brunstein D et al.,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Fluctuations of glaciers in the tropical Andes over the last millennium and palaeoclimatic implications: A review,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
269-282.

20.
Masiokas MH, Rivera A, Espizua LE, Villalba R et al.,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Glacier fluctuations in extratropical South America during the past 1000 years,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
242-268.

21.
Masiokas MH, Luckman BH, Villalba R, Delgado S et al.,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Little Ice Age fluctuations of small glaciers in the Monte Fitz Roy and Lago del Desierto areas, south Patagonian Andes, Argentina,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
351-362.

22.
Quesne CL, Acuña C, Boninsegna JA, Rivera A & Barichivich J,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Long-term glacier variations in the Central Andes of Argentina and Chile, inferred from historical records and tree-ring reconstructed precipitation,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
334-344.

23.
Fey M, Korr C, Maidana NI, Carrevedo ML et al.,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Palaeoenvironmental changes during the last 1600 years inferred from the sediment record of a cirque lake in southern Patagonia (Laguna Las Vizcachas, Argentina),
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
363-375.

24.
Villalba R, Grosjean M & Kiefer T,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Preface: Long-term multi-proxy climate reconstructions and dynamics in South America (LOTRED-SA),
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
175-179.

25.
Garreaud RD, Vuille M, Compagnucci R & Marengo J,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Present-day South American climate,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
180-195.

26.
Morales M, Barberena R, Belardi JB, Borrero L et al.,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Reviewing human–environment interactions in arid regions of southern South America during the past 3000 years,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
283-295.

27.
Solíz C, Villalba R, Argollo J, Morales MS et al.,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
Spatio-temporal variations in Polylepis tarapacana radial growth across the Bolivian Altiplano during the 20th century,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
296-308.

28.
Espizua LE & Pitte P,
Eds. Villalba R, Grosjean M & Kiefer T,
(2009),
The Little Ice Age glacier advance in the Central Andes (35°S), Argentina,
Palaeogeography, Palaeoclimatology, Palaeoecology,
Vol. 281,
Issue 3-4,
345-350.

Abstract volumes

1.
(Various authors),
(2010),
2nd International LOTRED-South America Symposium: Reconstructing Climate Variations in South America and the Antarctic Peninsula over the last 2000 years.

2.
(Various authors),
(2006),
1st International LOTRED-South America Symposium: Reconstructing Past Regional Climate Variations in South America over the late Holocene.

Course materials

1.
Garreaud R & Birks J,
(2010),
Course material: South American Climatology and Quantitative High-Resolution Climate Reconstructions in Paleoecology.

The LOTRED-SA metadatabase gives an overview of the proxy-network in southern South America with focus on the last 1000 years. It provides meta-information of proxy sites of different natural and human archives that might be suitable for climate reconstructions of high temporal resolution. 

> Go to the metadatabase

Three good reasons to contribute your data set

1. It is increasingly within the policy (or even a pre-condition) of funding agencies that supported projects make their results and data sets available. You benefit from co-authorship of important contributions, your work is cited, and your data is used. For example "The IGBP places high priority on establishment, maintenance, validation, description, accessibility, and distribution of high-quality, long-term global data sets, including the synthesis or generation of new global data sets," and "Full and open sharing of the full suite of global data sets, and other data sets needed for global change studies, is the primary objective of the IGBP-DIS" (IGBP Report No. 12).

2. The coordinators of LOTRED-SA and IGBP-PAGES officials may write letters of support for proposals, or even endorse projects for those who contribute.

3. The results of LOTRED are expected to reach a wide recognition, and it may be helpful for you and your research group if your data sets are included. Funding agencies might be interested in evaluating who contributed and which type of archives serves best for climate reconstructions. 

An example: Pauling et al. 2003 (GRL) concluded that lake sediments are not among the useful proxies to reconstruct climate in Europe. The reason is simple: only one time series was made available for the reconstruction.

Data security

We are aware that contributing with sets of raw and original data to a data base may be problematic in some cases, particularly if the data set is not yet fully and extensively published. This sensitive issue will be handled with utmost care. The data will be physically stored with the coordinators Ricardo Villalba and Martin Grosjean. They guarantee that no dataset will leave unless explicitly authorized by the provider. Publication of work that arises from the data base will ONLY include metadata, where the individual data set and the original data are not visible. 

During the course of the initiative, a plan for research and investigation, and related publications will be established. Important publications will feature the lead author (who performed the analysis and produced the metadata) and the collective of contributors to LOTRED-SA.

You will have the option to protect your data or to make it accessible preferably on the NOAA's World Data Center for Paleoclimatology website.

IGBP's Rules and Regulations for Privacy apply. 

What kind of proxy data are welcome?

All types of documentary data, early instrumental records and well dated, annual or decadal-resolution natural proxies such as tree rings, corals, lake sediments, ice cores and glaciers etc that are related to (or thought to be related to) any climate parameter or weather phenomena are welcome.

Data quality requirements

- The proxy data series should have a minimum length of 100 to 150 years

- Updated data series are ideal

Long continuous series are most valuable. However, also records over a few years or discrete observations are highly valuable (mostly for verification purposes)

- Series with many data points (high resolution: annual, decadal) are most valuable

- Please provide RAW DATA (not filtered, not smoothed, not treated)

- Time series should have NO missing values within the 20th century (calibration period)

- Proxies which do not have data in the 20th century calibration period: Are there any possibilities to infer the climatic signal based on historical instrumental time series or other proxies?

- Even though the focus is on southern South America, data series from entire South America and surrounding areas are welcome.

Contact

For questions regarding the data or how to contribute new data, contact Raphael Neukom. 

Website on Andean glaciers

The “Glaciares de Argentina” website is a non-profit, purely educational initiative designed for discussion and dissemination of everything related to Andean glaciers in Argentina. The idea is to include news, specialists’ notes, information on the glaciers that have been studied so far in the country, interesting links, research projects, etc., and to keep extending and improving the website with material from new study areas, ongoing or concluded investigations, etc.

The site was created and is maintained by personnel of IANIGLA, Mendoza and is hosted at the National University of Cuyo web servers. For now, the contents are only in Spanish because the main purpose of the site is to reach a broad audience in Argentina and neighboring countries, where English is not usually read or spoken fluently. Comments or suggestions are always welcome and should be addressed to the moderator of the site, Mariano Masiokas.

 

 

References:

Briffa, K.R. and Osborn, T.J., 2002: Blowing Hot and Cold, Science, 295: 2227-2228
Cook, E.R., Woodhouse, C.A., Eakin, C.M., Meko, D.M. and Stahle, D.W., 2004: Long-Term Aridity Changes in the Western United States, Science, 306: 1015-1018.
Luterbacher, J., Dietrich, D., Xoplaki, E., Grosjean, M. and Wanner, H., 2004: European Seasonal and Annual Temperature Variability, Trends, and Extremes Since 1500, Science, 303: 1499-1503.
Mann, M.E., Bradley, R.S. and Hughes, M.K., 1998: Global-scale temperature patterns and climate forcing over the past six centuries, Nature, 392: 779-787.
Moberg, A., Sonechkin, D.M, Holmgren, K., Datsenko, N.M. and Karlén, W., 2005: Highly variable Northern Hemisphere temperatures reconstructed from low- and high-resolution proxy data, Nature, 433: 613-617.
Pauling, A., Luterbacher, J., Casty, C. and Wanner, H., 2006: Five hundred years of gridded high-resolution precipitation reconstructions over Europe and the connection to large-scale circulation, Climate Dynamics, 26(4): 387-405.
Wanner, H., 2005: Call for a PAGES Initiative on "Past Regional Climate Variability", PAGES News, 13(1): 19-21.
Xoplaki, E., Luterbacher, J., Paeth, H., Dietrich, D., Steiner, N., Grosjean, M. and Wanner, H., 2005: European spring and autumn temperature variability and change of extremes over the last half millennium, Geophysical Research Letters, 32, L15713.