Dwarf Fortress Bug Tracker - Dwarf Fortress
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IDProjectCategoryView StatusDate SubmittedLast Update
0002673Dwarf FortressDwarf Mode -- Environmentpublic2010-07-13 04:052015-01-10 09:13
Reporterlibelnon 
Assigned To 
PrioritynormalSeverityminorReproducibilityN/A
StatusnewResolutionopen 
PlatformOSWindows 7OS VersionProfessional
Product Version0.31.10 
Target VersionFixed in Version 
Summary0002673: Entire sections of the ocean freezing over in winter
DescriptionOn embark in the last 2-3 fortresses I've made, I've been in temperate climates with a coastal fortress. I've noticed the ocean being frozen over completely, until about 11-13 days later when it thawed.
Steps To Reproduce1 - select a coastal embark with cold or temperate weather.
2 - Embark, and look at the ocean. Is it frozen?
Additional InformationProbably a bug, as I can't remember it happening in versions prior.
TagsIntentional/Expected?
Relationships
related to 0001653new  Ocean Ice Sheets unstable. 
parent of 0003166confirmed lethosor All sorts of weirdness with freezing oceans in adventure mode 
related to 0002272new  Issues with Arctic Oceans 
Not all the children of this issue are yet resolved or closed.
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2010-07-13 04:05libelnonNew Issue
2010-07-13 05:31Logical2uNote Added: 0010115
2010-08-05 14:14libelnonNote Added: 0011532
2010-09-07 04:34DwarfuRelationship addedparent of 0003166
2012-02-17 07:51FootkerchiefRelationship addedrelated to 0004215
2012-03-29 23:22KogutNote Added: 0021889
2014-01-27 14:32FootkerchiefRelationship addedrelated to 0001653
2014-01-27 20:24FootkerchiefRelationship addedrelated to 0002272
2014-01-27 20:25FootkerchiefRelationship deletedrelated to 0004215
2015-01-10 06:13ptb_ptbNote Added: 0031838
2015-01-10 06:13ptb_ptbTag Attached: Intentional/Expected?
2015-01-10 06:19ptb_ptbNote Edited: 0031838bug_revision_view_page.php?bugnote_id=0031838#r12762
2015-01-10 09:13IjieroNote Added: 0031845
2018-04-16 18:18HuntthetrollIssue Monitored: Huntthetroll

Notes
(0010115)
Logical2u   
2010-07-13 05:31   
A few notes.

1. I can imagine the recent temperature changes may have caused issues, but I think this might be expected behaviour.
2. Is the ocean temperate as well as the land? The two biomes, even though they are right next to each, can have different temperatures.
3. Even temperate biomes can have brief freezing periods. Typically about 2 in-game weeks, I believe.
4. The ocean can freeze (Icebreakers and all) and the game currently doesn't give salt-water any different properties than fresh-water (so the freezing temps are the same).
5. Freezing/melting behaviour leaves a lot to be desired but that's a suggestion and not a bug.

So as it stands I think you just have a fortress with a temperate but freezing biome that is resulting in a frozen ocean for a short period of time. A cold biome ocean is probably going to freeze for longer.
(0011532)
libelnon   
2010-08-05 14:14   
I didn't think that oceans were supposed to freeze over. Never used to.
(0021889)
Kogut   
2012-03-29 23:22   
Why oceans are not supposed to freeze over? For example our Nort Pole is on frozen ocean (image: http://en.wikipedia.org/wiki/File:Noaa3-2006-0602-1206.jpg [^] )

"probably a bug, as I can't remember it happening in versions prior." is ridiculous, according to this logic any new feature is a bug.
(0031838)
ptb_ptb   
2015-01-10 06:13   
(edited on: 2015-01-10 06:19)
In cold areas of ocean ice is formed overnight, which melts early in the morning.

To reproduce find an area of ice at night that is near the border between ocean ice / ocean water. Walk (or crawl) around until dawn arrives. The game will freeze for several minutes (around seven minutes for me).

Save file: http://dffd.wimbli.com/file.php?id=10411 [^]

I think the 'bug' aspect is the suddenness with which it changes, although this is similar to the 'snap freezing' of rivers and ponds that often claims the lives of careless adventurers.
(0031845)
Ijiero   
2015-01-10 09:13   
Oceans can freeze in real life. You can cross from alaska to Russia or the other way around during winter. This probably isn't a bug...