Safeguards against runaway effects

[fmaussion]

One way to deal with problems in very long time series (e.g. GlacierMIP) is to prevent grid points along the flowline to increase their area above a certain threshold (e.g. twice their original area), or at least for the mass-balance input.

This is very dirty though and I would prefer to avoid that.

[lilianschuster]

Here is a list of glaciers that I identified to create a runaway for some of the historical GlacierMIP3 experiments:

['RGI60-07.01136', 'RGI60-09.00922', 'RGI60-04.04920', 'RGI60-13.53885', 'RGI60-07.00131', 'RGI60-05.08792', 'RGI60-04.02942', 'RGI60-07.00079', 'RGI60-05.10149', 'RGI60-07.00284', 'RGI60-08.00005', 'RGI60-03.01538', 'RGI60-07.01569', 'RGI60-07.01160', 'RGI60-03.02785', 'RGI60-09.00546', 'RGI60-03.03419', 'RGI60-03.03585', 'RGI60-05.10521', 'RGI60-04.00190', 'RGI60-05.10000', 'RGI60-10.05039', 'RGI60-04.02794', 'RGI60-03.01053', 'RGI60-09.00017', 'RGI60-03.01972', 'RGI60-09.00477', 'RGI60-05.10204', 'RGI60-09.00565', 'RGI60-01.21011', 'RGI60-04.05013', 'RGI60-05.10033', 'RGI60-09.00930', 'RGI60-05.02477', 'RGI60-09.00461', 'RGI60-09.00564', 'RGI60-03.03980', 'RGI60-17.02945', 'RGI60-09.00933', 'RGI60-04.06461', 'RGI60-07.01570', 'RGI60-08.02392', 'RGI60-04.00318', 'RGI60-07.00226', 'RGI60-08.00287', 'RGI60-05.09561', 'RGI60-10.04609', 'RGI60-04.03275', 'RGI60-09.00244', 'RGI60-05.09696']

• Related to that: 'RGI60-05.10315' (largest glacier in RGI05 with 23% of total RGI area) creates no runaway effect but reacts only very slowly, i.e., under stable climate conditions, it stabilises only after 1000-5000 years)

[fmaussion]

Thanks! RGI60-05.10315 is horrible yes, will be corrected in RGI7. @bearecinos wrote an entire paper about this glacier 😅