If you don't mind adding an additional column, then in column D (assuming your data is in col A:C) use the formula
=COUNTIFS($A$2:$A$7;"="&A2;$B$2:$B$7;"="&B2)
Be sure to change A7 and B7 to the end of your range. This counts how many repeats match the condition of what is in column A and B for the current row. Unique rows will evaluate to 1, while anything with a repeat will be 2/+. Data does not have to be sorted for this to work. Note that it only identifies duplicates in a generic sense (a specific "clone group" is not uniquely identified against another clone group), but you'll know how many duplicates there are for that set of data (Sal of 349,884 and temp of -0,8864).
Hope this helps.