Table 4 Formulas and meteorological variables used for calculating tourism climate indices.

From: High-resolution regional climate projections and tourism impacts in the Macaronesian archipelagos

Index

Formula

Meteorological variables

TCI

\(0.5 \cdot \text {TC} + 0.2 \cdot \text {RR} + 0.2 \cdot \text {SS} + 0.1 \cdot \text {FG}\)

TC, RR, SS, and FG (TC depends on TG, TX, HUG, and HUN)

HCIB

\(0.2 \cdot \text {TC} + 0.3 \cdot \text {RR} + 0.4 \cdot \text {CC} + 0.1 \cdot \text {FG}\)

TC, RR, CC, and FG (TC depends on TX and HUG)

HCIU

\(0.4 \cdot \text {TC} + 0.3 \cdot \text {RR} + 0.2 \cdot \text {CC} + 0.1 \cdot \text {FG}\)

TC, RR, CC, and FG (TC depends on TX and HUG)

CCI

\((0.5 \cdot \text {TC} + 0.5 \cdot \text {SS})\) or 3

TC, TX, TN, RR, SS, and FG (TC depends on TG and HUG)

  1. Note that for CCI, the formula \((0.5 \cdot \text {TC} + 0.5 \cdot \text {SS})\) is used only when certain meteorological variables are within predefined favorable thresholds (\(TN \ge {8}{^{\circ }\hbox {C}}\) and \(TX \le {34}{^{\circ }\hbox {C}}\) and \(RR \le {10}\)  mm and \(FG \le {23}\,{\textrm{km} \hbox {h}^{-1}}\)). Otherwise, if any of these conditions are not met, CCI is assigned a fixed value of 3.
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