Add code and data availability + acknowledgements

dual-problems.tex

@@ -659,6 +659,20 @@ \section{Conclusion}
 But making it easier to simulate terminus evolution is a virtual requirement for testing these calving laws with computer models.
 
 
+
+% ----------------------------------
+\section{Code and data availability}
+
+The complete source code used for the simulations described in this paper is available at: https://github.com/icepack/dual-problems.git.
+
+
+
+% ------------------------
+\section{Acknowledgements}
+
+We thank Robert Baraldi for many helpful discussions.
+DRS was supported by US National Science Foundation (grant OAC-1835321) and National Aeronautics and Space Administration (grants 80NSSC20K0954 and 80NSSC21K1003).
+
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 \bibliographystyle{igs}
 \bibliography{dual-problems.bib}