Corrigendum

Due to a combination of errors, the figures in “Evaluation of Atmospheric Fields from the ECMWF Seasonal Forecasts over a 15-year Period,” by G. J. van Oldenborgh, M. A. Balmaseda, L. Ferranti, T. N. Stockdale, and D. L. T. Anderson, which was published in the Journal of Climate, Vol. 18, No. 16, 3250–3269, were presented at an inferior quality than what the authors intended. The same figures are reproduced here with better quality, and should help the readers more easily interpret the analyses that are presented in the figures and discussed in the article. The staff of the Journal of Climate regrets any inconvenience this error may have caused.


C O R R I G E N D U M
In "Ixora coccinea petal shaped high gain miniaturized massive multiple input multiple output antenna element for a long term evaluation/fifth generation macro cell communications", which was published in volume 31 issue 12, December 2021 [https://doi.org/10.1002/mmce.22885], the errors detailed below were identified. These have been corrected in the online version of the article, and they do not affect the overall conclusions

Article title
The title of the article was changed. The correct title is as follows: Nature enthused high isolation high gain miniaturized multiple-input multiple-output antenna for A-LTE/ 5G macro cell base transceiver station applications The following paragraphs should have been included at the end of the section 2, but were originally omitted:

Section 2 | DESIGN OF AN ANTENNA ELEMENT
The novelty of the proposed antenna configuration is to mitigate the wideband and high isolation characteristics and high throughput for polarization and spatial diversity. By incorporating the parallel rectangular vertical shorting rods and coaxial probe with tapering each arm of the radiator and chamfering's are also included on the edges and in between two adjacent arms of the bowtie antenna to provide wide bandwidth and high isolation. The chamfering on each arm and the tapering of the radiators, improves the port to port isolation and also suppress the cross polarization levels.
An equivalent circuit model characterizes the effect of coupling between the parallel vertical rods and the coaxial cables, which together reduces the near field coupling between the adjacent channels. The additional parallel metallic vertical rods are utilized to seek the return current path to the ground plane.
Polarization and spatial diversity is achieved by utilizing dual slant 45 deg polarized antenna elements with independent channels. The proposed radiator consists of two pairs of tapered bow-tie antenna elements fed separately with 50 Ω coaxial feeds for slant 45 0 polarization. The compactness of the antenna is achieved by miniaturizing the radiator to 0.49λ 0 . The prototype antenna is enclosed with Teflon radome with dielectric constant of 2.1 and low loss tangent 0.00028. The thickness of radome is optimized to 1.5 mm and to achieve the better efficiency, the radome is painted with a non-metallic coating, which protects the antenna The following two paragraphs should have been included at the beginning of the section 3.1, but were originally omitted:

Section 3.1 | Antenna analysis
The measured and simulated scattering parameters of the dual-polarized antenna are presented in Figure 3. An Agilent N9927A VNA is used to characterize the antenna. Measurement results show that the petal shaped dipole antenna is operating from 2.5 to 3.8 GHz (return loss (S 11 in dB) < À15, 41.26%) with isolation (jS 21 j) ≤ À40 dB. The variation in the measured and the simulated results are due to the coaxial cable loss, conductor loss, an inductive effect of soldering. Figure 4, represents the simulated return loss (S 11 /S 22 in dB) of the proposed antenna with different spacing (S). The effect on the return loss is observed by varying the gap between the antenna ports to shorting pins by keeping all other variables constant. Parallel combination of the inductance, shunt capacitance is due to shorting via length and distance between the top radiators to the ground plane respectively. Series capacitance is introduced by the separation between the antenna ports to the shorting post. As spacing increases from 0.5 to 2.3 mm, shift in the lower frequency band and thereby improvement in the impedance bandwidth is observed. An effect on the isolation parameter with different spacing (S) values is depicted in the Figure 5.
In the version of Figure 3 originally published, the comparison between stimulated and measured S-parameters were incorrectly updated.
The original figure is shown on the left and the corrected figure is the right.

F I G U R E 3 Comparison between simulated and measured Sparameters of the proposed antenna
The following section 3.3 should have been included as new text along with Figures 9-13:

| MIMO and diversity performance characteristics
The diversity performance of the MIMO system is characterized by four important parameters such as envelope correlation coefficient (ECC), diversity gain (DG), mean effective gain (MEG), and total active reflection coefficient (TARC). The ECC describes the independent behavior of the adjacent antennas radiation patterns. The practical value of ECC should be <0.5 for a good radiator with the excitation at different ports of antenna, ECC is calculated using farfield radiation patterns at the resonant frequency using Equation (3) ECC ¼ Here, E 1 (θ,ϕ) (Ω), E 2 (θ,ϕ) (Ω) are complex electric fields along θ and ϕ radiated by the antenna fed by two different ports and Ω is the solid angle. ECC in terms of S-parameters is given by the following equation, Where S 11, S 22 is the reflection coefficient and S 12 /S 21 is the isolation.
For the proposed antenna, the ECC is 0.000325 at 2.7 GHz and 0.000533 at 3.5 GHz, as shown in Fig. 9 from radiation patterns. Diversity Gain (DG) is another diversity parameter for verifying the signal to noise ratio of a MIMO is shown in Fig. 10. For a MIMO system, diversity gain of 10 dB is acceptable, and in terms of ECC, a diversity gain is given by the following equation.
Evaluation of the MEG is for observing the gain performance of the proposed antenna with consideration of environmental effects. When each dual polarized antenna receives the same amount of power, the MEG ratio of the two antennas are equal to 1, which means that no performance degradation due to power disparity. Simulated and measured MEG Vs Frequency is shown in Fig. 11 The MEG is calculated using following equation, Another parameter for verifying the radiation performance of the MIMO antenna with multiple ports is TARC which is shown in Fig. 12. The TARC is calculated using S-parameters by the following equation (7).
Where 'θ' is input signal angle.

Acknowledgments section
The Acknowledgments section was significantly revised and expanded; the final text is as follows.

AUTHOR BIOGRAPHIES
The author photos and biographies were missing in the originally published article which is inserted as follows. F I G U R E 1 3 shows that the radiation efficiency of the proposed antenna is more than 95% in the operating band