GIA model output for bedrock displacement at geodetic GPS sites in the Casey-Davis region of East Antarctica

This dataset includes predictions of bedrock motion due to glacial isostatic adjustment from a range of published forward and inverse models. The predictions are only for the geodetic GPS sites considered within AAS4318:Site(4-character ID), longitude (decimal degrees), latitude (decimal degrees) CAS1 110.519729 -66.283391DAV1 77.972630 -68.577332BHIL 100.599007 -66.251025CAD2 86.100628 -68.566511CAD3 96.363668 -66.521104CAD4 99.143786 -67.419656CAD5 107.764024 -66.552476CAD6 120.990964 -66.789283The file is ascii text with each row the GIA prediction for one site. The columns are given as:Site(4-character ID) Latitude(decimal degrees) Lon(decimal degrees) G14(mm/yr) C18(mm/yr) REGINA(mm/yr) RATES(mm/yr) ICE6G_D IJ05R2_115kmLT(mm/yr) W12_best(mm/yr)Values are interpolated from the resolution of the grids as published using a bicubic interpolator using GMT5 grdtrack with default settings.The reference frame of the different GIA model predictions vary, with the forward models in centre-of-mass of the solid Earth (CE) and the inverse solutions likely in centre-of-mass of the whole Earth system (CM). The original publications should be checked to confirm this.ReferencesG14: Gunter, B. C., Didova, O., Riva, R. E. M., Ligtenberg, S. R. M., Lenaerts, J. T. M., King, M. A., van den Broeke, M. R., and Urban, T.: Empirical estimation of present-day Antarctic glacial isostatic adjustment and ice mass change, The Cryosphere, 8, 743–760, https://doi.org/10.5194/tc-8-743-2014, 2014C18: Caron, L., Ivins, E. R., Larour, E., Adhikari, S., Nilsson, J., and Blewitt, G. (2018). GIA model statistics for GRACE hydrology, cryosphere, and ocean science. Geophysical Research Letters, 45, 2203– 2212. https://doi.org/10.1002/2017GL076644REGINA: Ingo Sasgen, Alba Martín-Español, Alexander Horvath, Volker Klemann, Elizabeth J Petrie, Bert Wouters, Martin Horwath, Roland Pail, Jonathan L Bamber, Peter J Clarke, Hannes Konrad, Mark R Drinkwater, Joint inversion estimate of regional glacial isostatic adjustment in Antarctica considering a lateral varying Earth structure (ESA STSE Project REGINA), Geophysical Journal International, Volume 211, Issue 3, December 2017, Pages 1534–1553, https://doi.org/10.1093/gji/ggx368RATES: Martín-Español, A. , Zammit-Mangion, A. , Clarke, P. J. , Flament, T. , Helm, V. , King, M. A. , Luthcke, S. B. , Petrie, E. , Rémy, F. , Schön, N. , Wouters, B. and Bamber, J. L. (2016): Spatial and temporal Antarctic Ice Sheet mass trends, glacio-isostatic adjustment, and surface processes from a joint inversion of satellite altimeter, gravity, and GPS data , Journal of Geophysical Research: Earth Surface, 121 (2), pp. 182-200 . doi: 10.1002/2015JF003550ICE6G_D: Peltier, W.R., Argus, D.F. and Drummond, R. (2018) Comment on "An Assessment of the ICE-6G_C (VM5a) Glacial Isostatic Adjustment Model" by Purcell et al. J. Geophys. Res. Solid Earth, 123, 2019-2018, doi:10.1002/2016JB013844.IJ05R2_115kmLT: Ivins, E. R., James, T. S., Wahr, J., O. Schrama, E. J., Landerer, F. W., and Simon, K. M. (2013), Antarctic contribution to sea level rise observed by GRACE with improved GIA correction, J. Geophys. Res. Solid Earth, 118, 3126– 3141, doi:10.1002/jgrb.50208.W12_best: Whitehouse, P.L., Bentley, M.J., Milne, G.A., King, M.A. and Thomas, I.D. (2012), A new glacial isostatic adjustment model for Antarctica: calibrated and tested using observations of relative sea‐level change and present‐day uplift rates. Geophysical Journal International, 190: 1464-1482. https://doi.org/10.1111/j.1365-246X.2012.05557.x

本数据集包含基于一系列已发表正演与反演模型得到的冰川均衡调整（glacial isostatic adjustment, GIA）引起的基岩运动预测结果。该类预测仅针对AAS4318中纳入的大地测量GPS测站，相关测站信息如下：
CAS1：经度110.519729°，纬度-66.283391°；
DAV1：经度77.972630°，纬度-68.577332°；
BHIL：经度100.599007°，纬度-66.251025°；
CAD2：经度86.100628°，纬度-68.566511°；
CAD3：经度96.363668°，纬度-66.521104°；
CAD4：经度99.143786°，纬度-67.419656°；
CAD5：经度107.764024°，纬度-66.552476°；
CAD6：经度120.990964°，纬度-66.789283°。

该文件为ASCII文本格式，每行对应一个测站的GIA预测结果，各列依次为：4字符ID、纬度（十进制度）、经度（十进制度）、G14(mm/yr)、C18(mm/yr)、REGINA(mm/yr)、RATES(mm/yr)、ICE6G_D(mm/yr)、IJ05R2_115kmLT(mm/yr)、W12_best(mm/yr)。

所有数值均基于已发表的网格分辨率，使用GMT5的grdtrack工具（采用默认设置）通过双三次插值器插值得到。

不同GIA模型预测结果的参考框架存在差异：正演模型采用固体地球质心（centre-of-mass of the solid Earth, CE）参考框架，而反演解大概率采用全地球系统质心（centre-of-mass of the whole Earth system, CM）参考框架，相关细节请查阅原始文献确认。

参考文献
G14：Gunter, B. C., Didova, O., Riva, R. E. M., Ligtenberg, S. R. M., Lenaerts, J. T. M., King, M. A., van den Broeke, M. R., and Urban, T.：《Empirical estimation of present-day Antarctic glacial isostatic adjustment and ice mass change》，《The Cryosphere》，第8卷，743–760页，https://doi.org/10.5194/tc-8-743-2014，2014年。
C18：Caron, L., Ivins, E. R., Larour, E., Adhikari, S., Nilsson, J., and Blewitt, G. (2018). 《GIA model statistics for GRACE hydrology, cryosphere, and ocean science》，《Geophysical Research Letters》，第45卷，2203–2212页，https://doi.org/10.1002/2017GL076644。
REGINA：Ingo Sasgen, Alba Martín-Español, Alexander Horvath, Volker Klemann, Elizabeth J Petrie, Bert Wouters, Martin Horwath, Roland Pail, Jonathan L Bamber, Peter J Clarke, Hannes Konrad, Mark R Drinkwater：《Joint inversion estimate of regional glacial isostatic adjustment in Antarctica considering a lateral varying Earth structure (ESA STSE Project REGINA)》，《Geophysical Journal International》，第211卷，第3期，2017年12月，1534–1553页，https://doi.org/10.1093/gji/ggx368。
RATES：Martín-Español, A. , Zammit-Mangion, A. , Clarke, P. J. , Flament, T. , Helm, V. , King, M. A. , Luthcke, S. B. , Petrie, E. , Rémy, F. , Schön, N. , Wouters, B. and Bamber, J. L. (2016)：《Spatial and temporal Antarctic Ice Sheet mass trends, glacio-isostatic adjustment, and surface processes from a joint inversion of satellite altimeter, gravity, and GPS data》，《Journal of Geophysical Research: Earth Surface》，第121卷，第2期，182-200页，doi: 10.1002/2015JF003550。
ICE6G_D：Peltier, W.R., Argus, D.F. and Drummond, R. (2018) 《Comment on "An Assessment of the ICE-6G_C (VM5a) Glacial Isostatic Adjustment Model" by Purcell et al.》，《Journal of Geophysical Research: Solid Earth》，第123卷，2019-2018页，doi:10.1002/2016JB013844。
IJ05R2_115kmLT：Ivins, E. R., James, T. S., Wahr, J., O. Schrama, E. J., Landerer, F. W., and Simon, K. M. (2013)：《Antarctic contribution to sea level rise observed by GRACE with improved GIA correction》，《Journal of Geophysical Research: Solid Earth》，第118卷，3126–3141页，doi:10.1002/jgrb.50208。
W12_best：Whitehouse, P.L., Bentley, M.J., Milne, G.A., King, M.A. and Thomas, I.D. (2012)：《A new glacial isostatic adjustment model for Antarctica: calibrated and tested using observations of relative sea‐level change and present‐day uplift rates》，《Geophysical Journal International》，第190卷，1464-1482页，https://doi.org/10.1111/j.1365-246X.2012.05557.x。