PALSEA2 QSR SI underway

quat sci revThe first contributions to the PALSEA2 special issue of Quaternary Science Reviews, titled "PALeo constraints on SEA level rise (PALSEA): ice-sheet and sea-level responses to past climate warming" are now available.

The importance of high-quality regional sea-level databases is demonstrated in the "Glacial isostatic adjustment along the Pacific coast of central North America" paper by Maryam Yousefi et al.

The authors use such a database to constrain the contribution of glacial isostatic adjustment to sea-level change and vertical land motion along the tectonically active coast of central North America. Their results can be used by other researchers to better understand tectonic processes and make more accurate estimates of future sea-level changes along this coastline.

In this article, a regional sea-level database for the Pacific coast of central North America was used to constrain a model of glacial isostatic adjustment (GIA). The influence of tectonics was carefully considered to ensure that the GIA parameter estimates are accurate. Model output using the optimal model parameter sets demonstrate that GIA is a significant contributor to both contemporary vertical land motion and relative sea level change in this region and so should be considered when interpreting observations of these signals and making relative sea-level projections. Model output of present-day vertical land motion at 483 GPS stations and sea-level change at 56 tide gauge stations is provided (with estimated uncertainty) so that these data can be used by various research communities to study non-GIA processes more accurately.

Access the Yousefi et al. paper here.
 
In the second paper, titled "Holocene sea-level history of the northern coast of South China Sea", Haixian Xiong et al. collected and analyzed seven sediment cores from the Pearl River delta, from which 16 new and high-quality sea-level index points are generated using a new approach. The study also re-checked and re-calibrated the previously published sea-level data from China's southeast coast with corrections made for tectonic subsidence and sediment compaction factors. These sea-level data indicate a rise of relative sea level from −49.3 ± 0.8 m to the present height between 10,500 and 7000 cal. a BP. This sea-level history is similar to those recorded from other far-field locations and ice-volume equivalent sea-level models.

Access the Xiong et al. paper here.

Access the QSR special issue here.