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Table 2 Comparisons of mean January temperatures and average January minimum temperatures between catch basins, external controls and weather stations of six locations south and north of the Alps

From: Investigation of temperature conditions in Swiss urban and suburban microhabitats for the overwintering suitability of diapausing Aedes albopictus eggs

Location Catch basins External controls Weather station Catch basins vs weather station External controls vs weather station Catch basins vs weather station
   Mann-Whitney U Mann-Whitney U Spearman’s correlation
Mean January temperatures ± SD (°C)a
Cadenazzo -1.12 ± 1.46 0.34 ± 2.21 0.84 ± 1.82 569.5* 409.0 0.685*
Chiasso -1.09 ± 1.03 -0.27 ± 2.10 -0.38 ± 2.20 708.5 421.0 0.846*
Stabio -0.61 ± 1.75 -0.13 ± 1.76 -0.75 ± 2.34 4155.5 1213.0 0.853*
Basel 1.62 ± 1.77 -0.26 ± 2.67 -1.68 ± 3.42 1847.0* 342.0 0.896*
Geneva 3.60 ± 2.37 2.57 ± 2.88 -1.15 ± 2.40 859.0* 753.0* 0.925*
Zurich 0.09 ± 1.74 -1.55 ± 3.01 -1.43 ± 3.41 2259.5* 1915.0 0.856*
Mean January minimum temperatures ± SD (°C)a
Cadenazzo -1.92 ± 1.39 -2.24 ± 1.93 -3.56 ± 2.09 728.0* 287.0* 0.760*
Chiasso -1.94 ± 1.28 -4.54 ± 2.41 -5.59 ± 2.36 179.0* 322.0 0.837*
Stabio -2.21 ± 1.70 -2.88 ± 1.84 -6.02 ± 2.73 1062.0* 468.0* 0.897*
Basel 0.98 ± 1.81 -1.65 ± 2.68 -4.47 ± 3.62 981.0* 241.0* 0.866*
Geneva 2.42 ± 2.46 0.71 ± 3.19 -3.95 ± 2.07 300.0* 322.0* 0.610*
Zurich -0.89 ± 1.79 -3.66 ± 3.15 -3.42 ± 3.28 1461.0* 1853.0 0.899*
  1. aBased on temperature data recorded in January 2017
  2. *Significant Mann-Whitney U outcomes and significant Spearman’s rank correlations coefficients
  3. Abbreviation: SD standard deviation