Poaceae pollen in the atmosphere of Zagreb (Croatia), 2002 – 2005

Figures & data

Table I. Presence of Poaceae pollen in Zagreb atmosphere 2002 – 2005.

Year	PS	R	PPD	PDC	AT	PTP	TV
2002	Apr 1/Sep 20	25	May 18	123	3 074	4.3	5
2003	Apr 20/Sep 23	22	May 19	154	2 711	5.1	4
2004	Apr 18/Oct 5	24	May 31	81	1 196	3.2	1
2005	Apr 14 /Sep 26	23	May 28	202	2 673	7.8	5
PS – pollen season, R – range (number of weeks), PPD – pollen peak day, PDC – peak day concentration (pollen grains/m^3 air), AT – annual total , PTP – % of the annual total of all pollen types, TV – the number of weeks with pollen concentration above 30 pollen grain in m^3 air threshold value at which allergy symptoms develop (According to the CAN threshold system).

Table II. Number of weeks of each allergenicity rank (according to the CAN threshold system; Belmonte et al. 2000) for each investigated year in Zagreb.

Year	Number of weeks per allergenicity category
	Null	Low	Mid	High	Very high
	0.0	0.1 – 4.9	5 – 19.9	20 – 29.9	> 30
	0	1	2	3	4
2002	27	11	6	3	5
2003	29	13	4	2	4
2004	28	15	6	2	1
2005	28	11	7	1	5

Figure 1 Annual sums of daily airborne grass pollen concentrations in Zagreb, 2002– 2005.

Figure 2 Variation of airborne grass pollen concentrations in Zagreb, 2002– 2005, shown as 10‐days running means.

Table III. Summarized results of the statistical analysis pollen data in relation to the meteorological parameters for the investigated period (2002 – 2005) in Zagreb.

STAT. NONPAR STATS	Spearman Rank Order Correlations MD pair wise deleted
Pair of Variables	Valid N	Spearman R	t (N‐2)	p‐level
2002
May Temp. & May Pollen	31	0.597053	4.008002	0.000391∗
May Precip. & May Pollen	31	−0.317391	−1.802400	0.081886
June Temp. & June Pollen	30	0.382310	2.189309	0.037072∗
June Precip. & June Pollen	30	−0.310569	−1.728870	0.094846
2003
May Temp. & May Pollen	31	−0.124798	−0.677355	0.503549
May Precip. & May Pollen	31	−0.206955	−1.139150	0.263963
June Temp. & June Pollen	30	0.426120	2.492426	0.018876∗
June Precip. & June Pollen	30	−0.252385	−1.380180	0.178453
2004
May Temp & May Pollen	31	0.587738	3.912071	0.000508∗
May Precip. & May Pollen	31	−0.519470	−3.273810	0.002746∗
June Temp. & June Pollen	30	0.516884	3.194997	0.003449∗
June Precip. & June Pollen	30	−0.402238	−2.324810	0.027556∗
2005
May Temp. & May Pollen	31	0.675106	4.928093	0.000031∗
May Precip. & May Pollen	31	−0.610718	−4.153340	0.000263∗
June Temp. & June Pollen	30	0.406236	2.352457	0.025910∗
June Precip. & June Pollen	30	−0.563624	−3.610540	0.001181∗

Table IV. Results of the statistical analysis diurnal pollen data in relation to the temperature and relative humidity.

STAT.NONPAR STATS	Spearman Rank Order Correlations MD pair‐wise deleted
Pair of variables	Valid N	Spearman R	t(N‐2)	p‐level
May Temp. & May Pollen	12	0.715789∗	3.24140	0.008848∗
May Humidity & May Pollen	12	−0.711034∗	−3.19770	0.009529∗
June Temp. & June Pollen	12	0.630474∗	2.56855	0.027960∗
June Humidity & June Pollen	12	−0.602453∗	−2.38691	0.038159∗

Figure 3 Variation of daily airborne grass pollen concentrations, temperature and precipitation in Zagreb, 2002– 2005.

Figure 4 Diurnal mean temperature and relative humidity variation in May/June, 2002 – 2005.

Belmonte , J. , Canela , M. and Guardia , R. A. 2000 . Comparison between categorical pollen data obtained by Hirst and Cour sampling methods. . Aerobiologia , 16 : 177 – 185 .

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