A simple two-dimensional parameterisation for Flux Footprint Prediction (FFP)

Kljun, N.; Calanca, P.; Rotach, M. W.; Schmid, H. P.

doi:10.5194/gmd-8-3695-2015

Articles | Volume 8, issue 11

https://doi.org/10.5194/gmd-8-3695-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/gmd-8-3695-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 8, issue 11

Development and technical paper

|

17 Nov 2015

Development and technical paper |

| 17 Nov 2015

A simple two-dimensional parameterisation for Flux Footprint Prediction (FFP)

N. Kljun, P. Calanca, M. W. Rotach, and H. P. Schmid

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Jan 2016	113	121	3	237
Feb 2016	136	106	2	244
Mar 2016	70	98	0	168
Apr 2016	39	78	2	119
May 2016	43	43	2	88
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Jul 2016	24	17	5	46
Aug 2016	19	15	1	35
Sep 2016	24	21	5	50
Oct 2016	60	42	1	103
Nov 2016	20	18	2	40
Dec 2016	26	23	2	51
Jan 2017	49	26	5	80
Feb 2017	44	25	2	71
Mar 2017	75	37	13	125
Apr 2017	91	35	7	133
May 2017	81	62	11	154
Jun 2017	85	40	11	136
Jul 2017	72	43	3	118
Aug 2017	49	41	0	90
Sep 2017	48	42	1	91
Oct 2017	49	44	0	93
Nov 2017	55	45	4	104
Dec 2017	51	42	1	94
Jan 2018	41	30	2	73
Feb 2018	61	35	2	98
Mar 2018	56	47	1	104
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Jun 2018	64	39	0	103
Jul 2018	50	42	0	92
Aug 2018	60	30	0	90
Sep 2018	38	36	0	74
Oct 2018	67	51	1	119
Nov 2018	84	64	1	149
Dec 2018	48	32	2	82
Jan 2019	49	37	2	88
Feb 2019	51	27	0	78
Mar 2019	67	53	0	120
Apr 2019	60	43	0	103
May 2019	65	51	1	117
Jun 2019	69	45	0	114
Jul 2019	52	47	1	100
Aug 2019	64	42	2	108
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Oct 2019	88	68	0	156
Nov 2019	61	52	2	115
Dec 2019	67	35	0	102
Jan 2020	59	43	3	105
Feb 2020	75	41	1	117
Mar 2020	63	51	1	115
Apr 2020	68	46	2	116
May 2020	82	45	0	127
Jun 2020	64	41	1	106
Jul 2020	70	49	32	151
Aug 2020	52	34	2	88
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Nov 2020	59	40	0	99
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Jan 2021	98	46	4	148
Feb 2021	67	48	1	116
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Apr 2021	103	75	5	183
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Jul 2021	66	68	2	136
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Mar 2022	170	69	5	244
Apr 2022	168	84	6	258
May 2022	159	77	2	238
Jun 2022	155	68	5	228
Jul 2022	112	56	3	171
Aug 2022	133	65	7	205
Sep 2022	134	81	2	217
Oct 2022	147	69	6	222
Nov 2022	188	98	8	294
Dec 2022	192	88	2	282
Jan 2023	205	109	3	317
Feb 2023	202	66	10	278
Mar 2023	267	125	4	396
Apr 2023	183	109	5	297
May 2023	232	116	6	354
Jun 2023	182	80	5	267
Jul 2023	229	96	12	337
Aug 2023	246	112	10	368
Sep 2023	217	99	5	321
Oct 2023	307	143	6	456
Nov 2023	220	83	3	306
Dec 2023	184	74	5	263
Jan 2024	247	94	4	345
Feb 2024	209	112	8	329
Mar 2024	247	93	8	348
Apr 2024	237	97	7	341
May 2024	193	107	15	315
Jun 2024	169	75	5	249
Jul 2024	167	82	9	258
Aug 2024	209	70	8	287
Sep 2024	190	53	4	247
Oct 2024	252	49	1	302
Nov 2024	197	62	2	261
Dec 2024	186	88	3	277
Jan 2025	145	64	2	211
Feb 2025	181	74	1	256
Mar 2025	191	40	0	231
Apr 2025	222	76	0	298
May 2025	220	53	1	274
Jun 2025	214	55	1	270
Jul 2025	242	69	1	312
Aug 2025	240	70	1	311
Sep 2025	154	73	1	228
Oct 2025	216	122	4	342
Nov 2025	253	62	9	324
Dec 2025	258	150	9	417
Jan 2026	238	171	16	425
Feb 2026	57	45	2	104

Cumulative views and downloads (calculated since 24 Aug 2015)

Month	HTML	PDF	XML	Total
Aug 2015	21	22	2	45
Sep 2015	19	26	1	46
Oct 2015	36	48	3	87
Nov 2015	118	115	2	235
Dec 2015	67	132	4	203
Jan 2016	113	121	3	237
Feb 2016	136	106	2	244
Mar 2016	70	98	0	168
Apr 2016	39	78	2	119
May 2016	43	43	2	88
Jun 2016	41	21	1	63
Jul 2016	24	17	5	46
Aug 2016	19	15	1	35
Sep 2016	24	21	5	50
Oct 2016	60	42	1	103
Nov 2016	20	18	2	40
Dec 2016	26	23	2	51
Jan 2017	49	26	5	80
Feb 2017	44	25	2	71
Mar 2017	75	37	13	125
Apr 2017	91	35	7	133
May 2017	81	62	11	154
Jun 2017	85	40	11	136
Jul 2017	72	43	3	118
Aug 2017	49	41	0	90
Sep 2017	48	42	1	91
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Nov 2017	55	45	4	104
Dec 2017	51	42	1	94
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Feb 2018	61	35	2	98
Mar 2018	56	47	1	104
Apr 2018	57	35	0	92
May 2018	50	43	3	96
Jun 2018	64	39	0	103
Jul 2018	50	42	0	92
Aug 2018	60	30	0	90
Sep 2018	38	36	0	74
Oct 2018	67	51	1	119
Nov 2018	84	64	1	149
Dec 2018	48	32	2	82
Jan 2019	49	37	2	88
Feb 2019	51	27	0	78
Mar 2019	67	53	0	120
Apr 2019	60	43	0	103
May 2019	65	51	1	117
Jun 2019	69	45	0	114
Jul 2019	52	47	1	100
Aug 2019	64	42	2	108
Sep 2019	79	50	1	130
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Nov 2019	61	52	2	115
Dec 2019	67	35	0	102
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Feb 2020	75	41	1	117
Mar 2020	63	51	1	115
Apr 2020	68	46	2	116
May 2020	82	45	0	127
Jun 2020	64	41	1	106
Jul 2020	70	49	32	151
Aug 2020	52	34	2	88
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Oct 2020	68	45	2	115
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Jun 2021	89	60	6	155
Jul 2021	66	68	2	136
Aug 2021	82	61	4	147
Sep 2021	89	63	3	155
Oct 2021	72	100	6	178
Nov 2021	79	67	4	150
Dec 2021	115	88	1	204
Jan 2022	118	75	2	195
Feb 2022	81	62	7	150
Mar 2022	170	69	5	244
Apr 2022	168	84	6	258
May 2022	159	77	2	238
Jun 2022	155	68	5	228
Jul 2022	112	56	3	171
Aug 2022	133	65	7	205
Sep 2022	134	81	2	217
Oct 2022	147	69	6	222
Nov 2022	188	98	8	294
Dec 2022	192	88	2	282
Jan 2023	205	109	3	317
Feb 2023	202	66	10	278
Mar 2023	267	125	4	396
Apr 2023	183	109	5	297
May 2023	232	116	6	354
Jun 2023	182	80	5	267
Jul 2023	229	96	12	337
Aug 2023	246	112	10	368
Sep 2023	217	99	5	321
Oct 2023	307	143	6	456
Nov 2023	220	83	3	306
Dec 2023	184	74	5	263
Jan 2024	247	94	4	345
Feb 2024	209	112	8	329
Mar 2024	247	93	8	348
Apr 2024	237	97	7	341
May 2024	193	107	15	315
Jun 2024	169	75	5	249
Jul 2024	167	82	9	258
Aug 2024	209	70	8	287
Sep 2024	190	53	4	247
Oct 2024	252	49	1	302
Nov 2024	197	62	2	261
Dec 2024	186	88	3	277
Jan 2025	145	64	2	211
Feb 2025	181	74	1	256
Mar 2025	191	40	0	231
Apr 2025	222	76	0	298
May 2025	220	53	1	274
Jun 2025	214	55	1	270
Jul 2025	242	69	1	312
Aug 2025	240	70	1	311
Sep 2025	154	73	1	228
Oct 2025	216	122	4	342
Nov 2025	253	62	9	324
Dec 2025	258	150	9	417
Jan 2026	238	171	16	425
Feb 2026	57	45	2	104

Latest update: 09 Feb 2026

Short summary

Flux footprint models describe the surface area of influence of a flux measurement. They are used for designing flux tower sites, and for interpretation of flux measurements. The two-dimensional footprint parameterisation (FFP) presented here is suitable for processing large data sets, and, unlike other fast footprint models, FFP is applicable to daytime or night-time measurements, fluxes from short masts over grassland to tall towers over mature forests, and even to airborne flux measurements.