## 3 Results
### Results with Monthly Values
The same occurs between the pollen types of _Olea, Pinus_, and _Platanus_ with the types _Populus_ and/or _Ulmus_ in almost all cases, except with the variables PT, V36, and RD. * In the three subtypes of the relative humidity variable, values of \(\rho>0.3\) and \(p\)-values \(<0.05\) are given, with all pollen types except _Populus_ and _Ulmus_. The positive correlation with Cupressaceae suggests that the higher the relative humidity, the higher the airborne pollen concentration. This is in contrast to _Olea, Pinus_, and _Platanus_, with which there are negative correlations. Precipitation only shows significant correlations (only PT) with _Olea_ and _Populus_, and these are among the weakest of all the correlations obtained in the study. With _Olea_, the correlation is negative, so it  
Figure 2: Graph showing the correlation results between the 2 study variables, obtained from monthly values, in the period 2013–2017. can be affirmed that the higher the precipitation, the lower the pollen concentration, contrary to what occurs with _Populus_ pollen. * The temperature variable (in its three subtypes) is the one that provides the most information, together with insolation, about the possible inter-relationship with the concentration of pollen grains since all the correlations are significant, except in three cases. With temperature, it is evident what was commented before, in that the group of pollen types _Olea, Pinus_, and _Platanus_ present positive correlations (so that the higher the temperature, the higher the concentration of these types of pollen), while for the rest of the types, the opposite occurs. With this meteorological variable, the strongest correlations occur with Cupressaceae, with values of \(\rho>0.7\). As for wind, all the results of significant correlations are positive, so it can be affirmed that the higher the wind speed, the higher the pollen concentration (VMax), and that with wind speeds higher than 36 km/h (V36), in general, there is also a higher concentration of pollen in the atmosphere. * Radiation is the meteorological parameter with the highest \(\rho\) values, especially with _Olea_ above all (in this case, it is with \(\rho>0.8\)--the highest values in this study--specifically with RG and RUV), and also with _Pinus_ and _Platanus_ (with \(\rho\geq 0.6377\)). Positive correlations occur with these three types, as well as with _Populus_. In these cases, the higher the diffuse radiation, the higher the pollen concentration. And with _Olea, Pinus_, and _Platanus_, the higher global and ultraviolet radiation, the higher the presence of pollen grains in the atmosphere. With Cupressaceae, the opposite is true, as mentioned above. * Finally, insolation also provides essential information on its possible influence on pollen grains in the atmosphere of the pollen types under study. Only with _Populus_ were no significant correlations obtained. With _Olea, Pinus_, and _Platanus_, the results were positive, so it can be affirmed that the more hours of sun exposure, the more pollen is expelled from the anthers of the flowers of these pollen types. However, the opposite occurs with Cupressaceae and _Ulmus_.