Relative DNI gap, CAMS vs NASA POWER, Kaloum

Name: Relative DNI gap, CAMS vs NASA POWER — Kaloum 2004-2020
Creator: Kuma Science
License: https://creativecommons.org/licenses/by/4.0/

Kaloum, Guinea
2004-2020
Monthly
%
Kuma computation

Mean: -14.8 %
Seasonal range: 49.0 %
Highest: April (12.1)
Lowest: June (-37.0)
Year-to-year variability: ± 2.30
Values: 203 months

Monthly value
12-month moving average
Period mean

Drag across the chart to zoom, double-click to reset.

Relative DNI gap, CAMS vs NASA POWER, %
Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
2020	-0.7	-1.0	4.3	-2.4	-1.4	-34.4	-35.7	-18.0	-37.3	-20.3	-7.2	-3.0	-13.1
2019	-9.9	0.2	-0.7	11.1	8.3	-33.1	-35.2	-24.1	-30.2	-29.5	-14.0	2.4	-12.9
2018	4.7	-6.6	-0.9	17.7	5.9	-37.5	-38.3	-31.7	-32.7	-27.5	-8.0	7.6	-12.3
2017	4.3	-1.1	7.4	11.9	-18.6	-33.6	-33.4	-31.7	-26.0	-21.3	-17.6	13.3	-12.2
2016	-11.4	-14.6	4.1	39.1	11.1	-34.7	-36.8	-41.0	-35.9	-23.5	-8.5	-0.0	-12.7
2015	-1.1	-4.2	3.4	1.3	5.6	-42.8	-30.6	-40.5	-34.0	-31.3	-13.7	-12.6	-16.7
2014	-7.8	1.5	-5.9	15.0	-14.0	-35.3	-39.8	-32.9	-33.1	-31.3	-23.2	5.8	-16.7
2013	-2.8	-5.8	-5.7	12.5	-11.4	-29.5	-35.9	-29.1	-39.9	-30.6	-13.7	-4.5	-16.4
2012	1.3	-11.5	-0.0	21.8	-8.3	-28.4	-29.9	-27.7	-24.6	-29.9	-17.7	-0.9	-13.0
2011	-2.0	6.8	1.6	10.4	-7.6	-38.3	-35.1	-36.3	-27.6	-26.8	-21.9	-7.0	-15.3
2010	-1.9	-12.3	-8.0	-6.7	-2.1	-37.2	-32.2	-33.9	-37.1	-25.3	-12.7	-15.9	-18.8
2009	-3.2	-2.2	5.6	32.8	8.7	-32.8	-28.8	-40.2	-30.7	-30.1	-13.7	-7.0	-11.8
2008	5.3	-15.5	-11.1	8.5	8.7	-38.9	-33.8	-38.2	-33.7	-35.1	-16.6	-3.5	-17.0
2007	-6.8	-1.8	-5.2	12.1	2.4	-37.0	-36.5	-27.0	-27.0	-22.2	-15.2	-7.1	-14.3
2006	-6.5	-4.1	-0.1	12.4	4.3	-38.5	-30.6	-34.2	-31.5	-28.1	-10.1	-4.1	-14.3
2005	-10.2	-5.0	-1.1	0.4	-19.4	-38.1	-33.2	-40.1	-32.8	-25.5	-12.7	-0.8	-18.2
2004	—	-18.7	-7.8	22.3	-19.3	-39.6	-24.4	-33.1	-26.7	-30.1	-13.9	3.9	—
Median	-2.4	-4.2	-0.7	12.1	-1.4	-37.0	-33.8	-33.1	-32.7	-28.1	-13.7	-3.0
P10	-10.0	-14.9	-7.9	-0.7	-18.9	-39.2	-37.4	-40.3	-37.2	-31.3	-19.3	-9.3
P90	4.5	0.7	4.8	26.5	8.7	-31.4	-29.4	-25.9	-26.4	-21.8	-8.3	6.5
Min.	-11.4	-18.7	-11.1	-6.7	-19.4	-42.8	-39.8	-41.0	-39.9	-35.1	-23.2	-15.9
Max.	5.3	6.8	7.4	39.1	11.1	-28.4	-24.4	-18.0	-24.6	-20.3	-7.2	13.3

CSV file

203 rows, 8 KB. Columns: period, value, unit, confidence level, status.

periode_type,annee_debut,annee_fin,mois,version_formule,valeur,unite,niveau_confiance,statut
mensuel,2004,2004,2,1,-18.7431,%,B,brut
mensuel,2004,2004,3,1,-7.79765,%,B,brut
mensuel,2004,2004,4,1,22.335,%,B,brut

Download the CSV

API

The same series, versioned, with a free key.

curl -H "Authorization: Bearer kuma_votre_cle" \
  "https://api.kumascience.com/v1/series/gin_conakry_ecart_relatif_dni_cams_kuma_calculs_2004_2020?format=csv"

Try it in the console

Python

Read the published file directly with pandas.

import pandas as pd

url = "https://kumascience.com/data/guinee/conakry_kaloum/ecart_relatif_dni_cams.csv"
df = pd.read_csv(url)
df.head()

Open the Python workbench

Same variable, other sources

2 series published for this variable in Kaloum. The gap compares period means, which do not always cover the same years.

Source	Period	Step	Mean (%)	Gap	-14.8-8.2
Kuma computation this record	2004-2020	monthly	-14.8	reference
Kuma computation	2021-2023	monthly	-8.2	+44.5 %

Notes

Source: Kuma Science, Internal calculations layer
Method: Kuma-derived computation
Unit: %
Time step: Monthly
Period: 2004-02-01 - 2020-12-31
Kuma qualification: Acceptable qualification, series derived by computation
Source licence: Licence à vérifier auprès de la source amont avant réutilisation.
Kuma licence: CC-BY 4.0, DOI 10.5281/zenodo.21051755

Kuma applied variables

Computations and regional positioning

Satellite cross-check

Distribution of relative gaps vs the reference source

Distribution of relative deviations, µ = -14.8%, σ = 17.3%

Histogram of monthly relative deviations Kuma NASA POWER vs reference source over 203 months. Vertical lines: 0 (equality), µ (mean), µ ± σ (one standard deviation). Source: Kuma Science, Internal calculations layer.

Cite this series

Kuma Science (2026). Relative DNI gap, CAMS vs NASA POWER, Kaloum (Guinea), 2004-2020. Kuma computation series, Guinea national energy data reference. DOI 10.5281/zenodo.21051755. https://kumascience.com/en/donnees/gin_conakry_ecart_relatif_dni_cams_kuma_calculs_2004_2020

@misc{kuma_gin_conakry_ecart_relatif_dni_cams_kuma_calculs_2004_2020,
  author       = {{Kuma Science}},
  title        = {Relative DNI gap, CAMS vs NASA POWER, Kaloum (Guinea), 2004-2020},
  year         = {2026},
  howpublished = {Kuma computation series},
  doi          = {10.5281/zenodo.21051755},
  url          = {https://kumascience.com/en/donnees/gin_conakry_ecart_relatif_dni_cams_kuma_calculs_2004_2020},
  note         = {License CC-BY 4.0}
}

TY  - DATA
AU  - Kuma Science
TI  - Relative DNI gap, CAMS vs NASA POWER, Kaloum (Guinea), 2004-2020
PY  - 2026
PB  - Kuma Science
DO  - 10.5281/zenodo.21051755
UR  - https://kumascience.com/en/donnees/gin_conakry_ecart_relatif_dni_cams_kuma_calculs_2004_2020
N1  - Kuma computation
ER  -

Also cite the primary source, whose licence applies to the published values.

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