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From 9 to 11 September 2019, the Waikato University QUEST partner organized a workshop on Quantitative palaeoclimate reconstructions using speleothems in the Avantidrome, Cambride (New Zealand). QUEST project partners as scientists from the field were invited to share progress and prospects beyond the timeline of the existing QUEST funding. Up to 15 scientists participated and presented and discussed updates of their research. Highlight was the presentation of a new prototype of an auto-sampler. The last day of workshop led to the Waipuna cave, with intensive sampling and in-situ measurements of drip water.
On Saturday 15th June, the QUEST team (Norbert Marwan, Sebastian Breitenbach, Ola Kwiecien, Bedartha Goswami, Cinthya Nava Fernandez and Adam Hartland) contributed to the “Lange Nacht der Wissenschaften” or “Long Night of Science” at the Postdam Institute for Climate Impact Research. Members of the public, young and old, enjoyed a series of interactive activities; learning about speleothems, cave science, exploration and climate, as well as the broader objectives of our interdisciplinary effort to quantify past environmental change from speleothems. Children had the opportunity to dress up as a caver, see a stalagmite forming before their eyes, handle real speleothems and an array of other activities; earning a stamp in their workbooks and a bat-shaped cookie for their efforts! The team put in a huge effort and by the close of the night (midnight), were thoroughly tired but pleased with the interest and response from visitors. Aside from the QUEST exhibit, which seemed particularly popular, the long night afforded an incredibly diverse and interesting range of experiences for visitors to the Wissenschaftspark Albert Einstein. As the evening closed a large number of visitors still milled through the exhibits, perhaps pausing to enjoy a drink and a snack, and listening to live musical performances by moonlight.
The artificial cave (GeoMIC) at Waikato took its maiden voyage from the workshop to the lab today! Thanks to Peter Jarman and Ingrid Lindeman for making this happen. Now time to crack on with experiments!
The development of a climate-control box at the University of Waikato (based on the prototype at JGU, Mainz) has made significant progress. This box, christened ‘GeoMIC’ (Geochemistry, Mineralogy, Isotopes and Climate), is a state-of-the-art climate-control box designed to provide QUEST researchers with a chamber of strictly-controlled atmosphere in which a wide range of laboratory experiments in geochemistry, mineralogy and climate science can be run. The box has been designed and constructed primarily by Dr. Adam Hartland and two technicians, in collaboration with Max Hansen (JGU) who spent a month visiting the University of Waikato in mid-2018. Max provided useful insights and advice during the construction of GeoMIC and the design of the first experiments to be run within the box.
GeoMIC will be used primarily for calcite growth experiments, with the atmosphere inside the chamber closely mimicking natural cave conditions. It has been constructed to ensure its suitability for experiments requiring trace element and isotopic analyses. GeoMIC has the potential for stable C and O isotope experiments to be run in the future. GeoMIC has been equipped with a 4-channel high-precision Heidolf peristaltic pump, high sensitivity Vaisala probes for humidity, temperature and CO2, and an entry port for two separate gases. Manual manipulation of an experiment after the chamber has been sealed to the outside environment can be achieved through four nitrile isolator-box gloves installed on the face of the box, designed for increased dexterity.
Perhaps the most impressive feature of GeoMIC is the purpose-built Labview software program that provides automatic control of the CO2, humidity and temperature within the chamber. The software ensures these parameters are kept at the user-specified values, as well as logging all atmospheric data for the duration of the experiment. This software also controls the peristaltic pump, so that changes in flow rate throughout an experiment can be achieved without manual intervention. Sequences specifying changes in temperature, humidity, flow rate and CO2 concentrations at set times throughout the experiment can be executed automatically using the software, and remote access to the GeoMIC computer ensures that the box atmosphere and the flow rates can be monitored and adjusted from anywhere in the world. This software represents a major improvement in the climate-control box system, as researchers will be required to spend significantly less time checking on and manually adjusting the environmental parameters. Importantly, the fluctuations in these parameters are also significantly smaller than when controlled manually, therefore a more constant environment is maintained.
GeoMIC is expected to be fully completed in February 2019, and several calcite growth experiments have already been designed to run upon completion of the system. These experiments allow the growth of calcite in a cave-analogue environment, and will provide valuable information about partitioning and fractionation of trace elements inside speleothems. The effects of the coordination of Cu, Co and Ni to organic ligands in cave dripwater will also be assessed. These experiments will potentially aid in the development of new trace element paleoclimate proxies for speleothem analysis.
Beth Fox, Sebastian Breitenbach, Ola Kwiecien, and Jessica Oster are convening the session CL1.22 Novel and quantitative methods for continental palaeoenvironmental reconstruction in the Climate, Past, Present, Future group at the EGU General Assembly (7-12 April 2019).
We aim at providing a forum for discussion of innovative, cross-disciplinary developments in terrestrial palaeoenvironmental reconstructions. Please consider submitting your abstract to our session! The deadline for submission is the 10th of January 2019; and you can find all details below.
We especially encourage abstract submissions of studies focused on quantitative proxies and innovative methods for reconstructing land-based environmental change.
If you have any questions regarding our session, please do not hesitate contacting us.
With kind regards, Beth, Seb, Ola, and Jessica
CL1.22 Novel and quantitative methods for continental palaeoenvironmental reconstruction Convener: Bethany FoxCo-conveners: Sebastian F.M. Breitenbach ,Ola Kwiecien ,Jessica Oster
In recent decades, quantitative methods have become increasingly important in the field of palaeoenvironmental and palaeoclimatic reconstruction, due to the need for comparison between different records and to provide boundary conditions for computational modelling. Continental environmental archives (e.g. speleothems, lake sediments, ice, or land snails) are often highly temporally resolved (subdecadal to seasonal) and may provide more direct information about atmospheric processes than marine archives. The wide variety of archive types available on land also allows for intercomparison and ground-truthing of results from different techniques and different proxies, and multi-proxy reconstructions from the same archive can disentangle local and supra-regional environmental conditions.
This session aims to highlight recent advances in the use of innovative and quantitative proxies to reconstruct past environmental change on land. We welcome studies of any continental archive, including but not limited to carbonates (caves, paleosols, snails), sediments (lakes, rivers, alluvial fans), ice, and biological proxies (tree rings, fossil assemblages, plant biomarkers). We particularly encourage studies involving the calibration of physical and chemical proxies that incorporate modern transfer functions, forward modeling and/or geochemical modeling to predict proxy signals, and quantitative estimates of past temperature and precipitation amounts. We also welcome reconstructions of temperature and hydrologic variability over large spatial scales, including paleoclimate data assimilation studies. This session will provide a forum for discussing recent innovations and future directions in the development of terrestrial palaeoenvironmental proxies on seasonal to multi-millennial timescales.